1975 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 | 357.80 372.27 363.60 353.60 338.80 326.53 321.00 327.87 319.00 321.27 325.00 335.87 343.80 355.01 367.66 377.97 386.83 391.33 404.42 | 272.93 293.00 287.60 277.40 256.87 247.73 247.00 247.87 239.67 239.87 236.00 242.53 250.26 259.58 279.85 286.19 294.74 302.90 313.22 | 76.3 78.7 79.1 78.5 75.8 75.9 77.0 75.6 75.1 74.7 72.6 72.2 72.8 73.1 76.1 75.7 76.2 77.0 77.5 | 13.44 24.07 58.18 52.00 42.6 36.74 29.58 29.51 33.79 43.59 49.54 69.03 75.50 80.98 119.47 140.41 168.17 193.47 241.28 | 2.01 2.63 5.12 11.67 12.96 12.32 14.46 25.20 38.62 55.52 66.82 104.10 129.76 162.91 175.01 210.42 242.11 273.27 306.41 |