... YEARSMEMEBlockGeneticDistance1968–1969 5 0.8 833 92 1 0.089 43 1969–1971 12 1.9 434 63 2 0 .36 781971–1972 11 1.9 434 63 3 0.2281972–19 73 22 3. 886926 4 0.1619 73 1974 5 0.8 833 92 5 0.1421974–1975 15 2.650177 6 0.2 93 1975–1980 29 ... 80.0481982–19 83 13 2.296820 9 0.28819 83 1984 2 0 .35 335 7 10 0.2121984–1985 1 0.176678 11 21985–1987 7 1. 236 749 12 0.1671987–1988 3 0. 530 035 13 1. 833 1988–1989 8 1.4 234 881989–1992 10 2.4 734 981992–1999 ... 1980,1982, 19 83, 1984,1985, 1987, 1988,1989, 1992, 30 2 30 7 34 6 35 1 34 9 35 4 36 1 36 6 37 6 38 1495 500 19 73, 1974, 1975,1980, 1982, 19 83, 1984, 1985, 1987,1988, 1989, 1992,558 5 63 All years except...