16618000 1940 14.8 91.0 1 19400825 5.00 1 19400728 16618000 1941 20.6 314 1 19410316 5.40 2 16618000 1942 30.8 696 1 19420310 6.30 1 19420204 16618000 1948 19.2 388 1 19480126 5.00 4 16618000 1949 12.2 118 1 19481224 4.30 1 19490921 16618000 1950 16.8 155 1 19500424 4.10 1 19491031 16618000 1951 16.3 187 1 19501126 4.50 8 16618000 1952 15.4 176 1 19511231 4.30 2 16618000 1953 13.0 156 1 19530504 3.90 8 16618000 1954 13.8 167 1 19540728 3.00 1 19540210 16618000 1955 18.3 142 1 19541216 5.00 6 16618000 1956 18.1 209 1 19551220 4.40 5 16618000 1957 15.0 203 1 19570824 4.40 1 19570624 16618000 1958 20.2 173 1 19571124 4.40 1 19571020 16618000 1959 18.6 213 1 19590408 5.40 1 19590727 16618000 1960 15.8 159 1 19600305 4.40 4 16618000 1961 13.1 297 1 19610402 4.20 1 19610326 16618000 1962 14.1 207 1 19611015 4.50 6 16618000 1963 13.1 170 1 19621214 3.50 16 16618000 1964 12.2 144 1 19640525 4.70 1 19640710 16618000 1965 18.8 339 1 19650502 5.30 2 16618000 1966 18.3 384 1 19651112 5.00 4 16618000 1967 15.4 206 1 19670322 5.80 1 19670623 16618000 1968 16.8 215 1 19680316 5.30 2 16618000 1969 24.0 291 1 19681129 4.50 11 16618000 1970 14.2 107 1 19700826 5.40 3 16618000 1976 11.1 227 1 19760304 3.70 4 16618000 1977 15.8 352 1 19770404 3.70 1 19770214 16618000 1978 14.2 176 1 19780706 4.00 1 19780222 16618000 1979 25.1 461 1 19781113 5.20 2 16618000 1980 27.0 498 1 19800401 5.10 5 16618000 1981 11.0 412 1 19810430 4.00 9 16618000 1982 28.5 383 1 19820125 4.50 1 19811010 16618000 1983 13.8 131 1 19830507 5.20 1 19830902 16618000 1984 12.7 185 1 19840113 3.20 1 19840930 16618000 1985 11.4 159 1 19850322 2.70 4 16618000 1986 23.3 322 1 19860410 4.70 1 19851121 16618000 1987 23.8 496 1 19870505 6.00 1 19870316 16618000 1988 27.0 452 1 19880128 5.60 3