1953 1958 1965 1970 1975 1978 | 21.6 15.2 17.7 22.2 39.4 27.5 | 74.6 112.2 124.5 119.7 149.6 178.7 | 0.8 1.2 3.5 2.7 6.6 9.3 | 3.0 3.7 6.9 7.2 12.8 15.7 | 0.3 0.3 0.7 0.9 0.6 1.4 | 0.6 1.1 2.0 1.2 1.9 2.7 | 25.9 51.7 106.2 103.9 115.2 121.6 | 26.2 53.0 91.5 89.0 107.3 127.1 | 0.003 0.02 0.08 0.14 0.22 0.11 | 0.7 1.4 1.8 1.9 4.4 4.6 |