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83 10 83 11 83 12 83 13 83 14 83 15 83 16 83 17 83 18 83 19 83 20 83 21 83 22 83 23 83 24 83 25 83 26 83 27 83 28 83 29 83 30 83 31 83 32 83 33 83 34 83 35 83 36 83 37 83 38 83 39 83 40 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974

= Free Coordinate    = Occupied(Single Region)     = Occupied (Var Region)     = Center of the grid