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15 91 15 92 15 93 15 94 15 95 15 96 15 97 15 98 15 99 16 00 16 01 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978

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