Source:  http://www.cdc.gov/nchs/about/major/nhanes/growthcharts/wtageinf.txt

          Age in
   Sex    Months            L                 M                 S                P3                P5                P10               P25               P50               P75               P90               P95               P97
       1        0    1.815151075       3.530203168       0.152385273       2.355450986       2.52690402        2.773801848       3.150611082       3.530203168       3.879076559       4.17249339        4.34029274        4.446488308
       1      0.5    1.547523128       4.003106424       0.146025021       2.799548641       2.964655655       3.209510017       3.597395573       4.003106424       4.387422565       4.718161283       4.910130108       5.032624982
       1      1.5    1.068795548       4.879525083       0.136478767       3.614688072       3.774848862       4.020561446       4.428872952       4.879525083       5.327327567       5.728152752       5.967101615       6.121929103
       1      2.5    0.695973505       5.672888765       0.129677511       4.34234145        4.503255345       4.754479354       5.183377547       5.672888765       6.175598158       6.638979132       6.921119162       7.106250132
       1      3.5    0.41981509        6.391391982       0.124717085       4.992897896       5.157411653       5.416802856       5.866806254       6.391391982       6.942217106       7.460702368       7.781401145       7.993878049
       1      4.5    0.219866801       7.041836432       0.121040119       5.575169066       5.744751566       6.01371624        6.484969167       7.041836432       7.635323002       8.202193202       8.556813353       8.793443663
       1      5.5    0.077505598       7.630425182       0.1182712         6.096775274       6.272175299       6.551379244       7.043626918       7.630425182       8.262032991       8.871384112       9.255614546       9.51330656
       1      6.5    -0.02190761       8.162951035       0.116153695       6.564430346       6.745992665       7.035656404       7.548345716       8.162951035       8.828786159       9.47546616        9.885435743       10.16135019
       1      7.5    -0.0894409        8.644832479       0.114510349       6.984123338       7.171952393       7.472021438       8.004398775       8.644832479       9.34149038        10.02101374       10.45331433       10.74492376
       1      8.5    -0.1334091        9.081119817       0.113217163       7.361236116       7.555286752       7.865532922       8.416718775       9.081119817       9.805593364       10.51406421       10.96573632       11.27083843
       1      9.5    -0.1600954        9.476500305       0.11218624        7.700624405       7.90075516        8.220839211       8.789881892       9.476500305       10.22612395       10.96017225       11.42867623       11.74538465
       1     10.5    -0.17429685       9.835307701       0.111354536       8.006677447       8.212683538       8.542195484       9.128109523       9.835307701       10.60772151       11.36445045       11.84763282       12.17435729
       1     11.5    -0.1797189        10.16153567       0.110676413       8.283364855       8.494999555       8.833485623       9.43527941        10.16153567       10.9546603        11.73160184       12.2276612        12.56308347
       1     12.5    -0.179254         10.45885399       0.110118635       8.534275028       8.751264252       9.098245709       9.714941801       10.45885399       11.27087147       12.06594792       12.57340193       12.91645043
       1     13.5    -0.17518447       10.7306256        0.109656941       8.762648582       8.984701111       9.339687673       9.970337596       10.7306256        11.55996332       12.37145331       12.88910809       13.23893338
       1     14.5    -0.16932268       10.97992482       0.109273653       8.971407287       9.198222429       9.560722369       10.20441778       10.97992482       11.82524099       12.65174864       13.17867019       13.53462171
       1     15.5    -0.1631139        11.20955529       0.10895596        9.163180317       9.394453831       9.763981751       10.41986276       11.20955529       12.06972515       12.91015164       13.44563963       13.80724431
       1     16.5    -0.15770999       11.4220677        0.108694678       9.340328068       9.575756968       9.951839998       10.61910138       11.4220677        12.29616991       13.14968707       13.6932508        14.0601935
       1     17.5    -0.15402279       11.61977698       0.108483324       9.504964014       9.744250626       10.12643352       10.80432929       11.61977698       12.50708008       13.37310558       13.92444193       14.29654774
       1     18.5    -0.15276214       11.80477902       0.108317416       9.658974787       9.901830339       10.28967982       10.97752662       11.80477902       12.70472779       13.58290165       14.14187481       14.51909298
       1     19.5    -0.15446658       11.9789663        0.108193944       9.804039109       10.05018686       10.44329524       11.14047457       11.9789663        12.89116805       13.78133058       14.34795358       14.73034312
       1     20.5    -0.15952202       12.14404334       0.108110954       9.941644878       10.19082308       10.58881155       11.2947714        12.14404334       13.06825426       13.9704249        14.54484233       14.93255878
       1     21.5    -0.16817926       12.30154103       0.108067236       10.07310549       10.32507004       10.72759156       11.44184727       12.30154103       13.23765258       14.15200982       14.73448194       15.12776542
       1     22.5    -0.1805668        12.45283028       0.108062078       10.19957488       10.45410181       10.86084353       11.58297823       12.45283028       13.40085582       14.3277181        14.91860604       15.31777023
       1     23.5    -0.19670196       12.59913494       0.108095077       10.32206165       10.57894925       10.98963476       11.7192993        12.59913494       13.55919667       14.49900418       15.09875606       15.50417803
       1     24.5    -0.21650121       12.74154396       0.108166005       10.4414422        10.70051298       11.11490406       11.85181666       12.74154396       13.71386029       14.6671577        15.27629562       15.68840631
       1     25.5    -0.23979048       12.88102276       0.108274705       10.55847309       10.81957536       11.23747341       11.98141892       12.88102276       13.86589625       14.83331632       15.45242405       15.87169941
       1     26.5    -0.26631585       13.01842382       0.108421024       10.67380261       10.93681171       11.35805876       12.10888759       13.01842382       14.0162298        14.99847794       15.62818936       16.05514188
       1     27.5    -0.29575496       13.1544966        0.108604769       10.78798156       11.05280067       11.47727994       12.23490671       13.1544966        14.1656725        15.16351231       15.80450043       16.23967114
       1     28.5    -0.32772936       13.28989667       0.108825681       10.90147346       11.168034         11.59566994       12.36007175       13.28989667       14.31493214       15.32917196       15.98213866       16.42608957
       1     29.5    -0.36181746       13.42519408       0.109083423       11.01466395       11.28292555       11.7136834        12.48489772       13.42519408       14.46462206       15.49610261       16.16176896       16.61507584
       1     30.5    -0.39756808       13.56088113       0.109377581       11.12786972       11.3978197        11.8317045        12.60982671       13.56088113       14.61526973       15.66485286       16.34395024       16.80719582
       1     31.5    -0.43452025       13.69737858       0.109707646       11.24134752       11.51299966       11.95005435       12.73523417       13.69737858       14.76732387       15.83588308       16.52914562       17.00291386
       1     32.5    -0.47218875       13.83504622       0.110073084       11.3552982        11.62869248       12.06899744       12.86143776       13.83504622       14.9211657        16.00957526       16.71773017       17.2025984
       1     33.5    -0.51012309       13.97418199       0.110473238       11.46987977       11.74507947       12.18874835       12.98869905       13.97418199       15.07710916       16.18623873       16.91000241       17.40653835
       1     34.5    -0.54788557       14.1150324        0.1109074         11.58520959       11.86229971       12.30947723       13.11723187       14.1150324        15.23541179       16.36611917       17.10619066       17.61494698
       1     35.5    -0.5850701        14.25779618       0.111374787       11.70137143       11.98045644       12.43131521       13.24720657       14.25779618       15.3962791        16.54940494       17.30646132       17.8279717