Year,Comm_land_kmt,F
1979,,
1980,13.5970,0.3152
1981,12.9010,0.3492
1982,15.1560,0.4667
1983,13.1780,0.5374
1984,10.1420,0.4950
1985,7.0700,0.5422
1986,4.5060,0.4276
1987,3.8490,0.4642
1988,3.4900,0.4330
1989,2.4210,0.3913
1990,2.4960,0.3681
1991,4.2610,0.4281
1992,6.4180,0.6444
1993,5.7180,0.6266
1994,5.0970,0.6390
1995,4.6480,0.6359
1996,4.3980,0.3889
1997,4.0020,0.3466
1998,3.6830,0.3019
1999,3.2570,0.2544
2000,4.3560,0.2962
2001,4.4790,0.3285
2002,3.5140,0.3227
2003,2.4870,0.2138
2004,1.7110,0.1530