1920     .99    1.00    2.00
 1921     .84    1.00    2.00
 1922     .86    1.00    2.00
 1923     .69    1.00    2.00
 1924     .63    1.00    2.00
 1925     .55    1.00    2.00
 1926     .52    1.00    2.00
 1927     .24    1.00    2.00
 1928     .05    1.00    2.00
 1929     .15    1.00    2.00
 1930     .12    1.00    2.00
 1931     .06    1.00    2.00
 1932     .06    1.00    2.00
 1933     .14    1.00    2.00
 1934     .16    1.00    2.00
 1935     .35    1.00    2.00
 1936     .29    1.00    2.00
 1937     .70    1.00    2.00
 1938     .69    1.00    2.00
 1939     .66    1.00    2.00
 1940     .63    1.00    2.00
 1941     .42    1.00    2.00
 1942     .16    1.00    2.00
 1943     .00    1.00    2.00
 1944     .08    1.00    2.00
 1945     .27    1.00    2.00
 1946     .35    1.00    2.00
 1947     .96    1.00    2.00
 1948     .98    1.00    2.00
 1949    1.13    1.00    2.00
 1950    1.33    1.00    2.00
 1951    1.14    1.00    2.00
 1952     .86    1.00    2.00
 1953     .84    1.00    2.00
 1954     .89    1.00    2.00
 1955     .66    1.00    2.00
 1956     .56    1.00    2.00
 1957     .20    1.00    2.00
 1958     .02    1.00    2.00
 1959     .06    1.00    2.00
 1960     .07    1.00    2.00
 1961     .02    1.00    2.00
 1962     .17    1.00    2.00
 1963     .11    1.00    2.00
 1964     .07    1.00    2.00
 1965     .19    1.00    2.00
 1966     .11    1.00    2.00
 1967     .44    1.00    2.00
 1968     .45    1.00    2.00
 1969     .30    1.00    2.00
 1970     .11    1.00    2.00
 1971     .02    1.00    2.00
 1972     .24    1.00    2.00
 1973     .31    1.00    2.00
 1974     .34    1.00    2.00
 1975     .37    1.00    2.00
 1976     .20    1.00    2.00
 1977     .50    1.00    2.00
 1978     .46    1.00    2.00
 1979     .33    1.00    2.00
 1980     .27    1.00    2.00
 1981     .30    1.00    2.00
 1982     .18    1.00    2.00
 1983     .03    1.00    2.00
 1984     .14    1.00    2.00
 1985     .06    1.00    2.00