Year,Comm_land_kmt
1960,0
1961,0
1962,0
1963,0.1759968
1964,0.374727578
1965,0.274439794
1966,0.22559796
1967,0.228492382
1968,0.221990933
1969,0.236654006
1970,0.270268488
1971,0.275075741
1972,0.304731202
1973,0.299375093
1974,0.39637201
1975,0.35930291
1976,0.469422929
1977,0.437085785
1978,0.63483588
1979,0.685176862
1980,0.889339046
1981,0.747173549
1982,0.90018
1983,1.19634
1984,1.04994
1985,0.97904
1986,1.10296
1987,0.83993
1988,0.69631
1989,0.54878
1990,0.40072
1991,0.48907
1992,0.46471
1993,0.5064
1994,0.4789931
1995,0.4669422
1996,0.3628691
1997,0.3086213
1998,0.2956683
1999,0.2573886
2000,0.2004196
2001,0.2495448
2002,0.1546768
2003,0.1289045
2004,0.1186205
2005,0.1177387