Year,Comm_land_mt,F
1934,519,0.00249818
1935,7549,0.0290285
1936,23162,0.0637839
1937,14823,0.0362048
1938,20640,0.0421514
1939,25406,0.0445583
1940,26762,0.0462573
1941,50796,0.0890626
1942,55892,0.102287
1943,48348,0.0953251
1944,50439,0.112743
1945,37912,0.0916701
1946,42423,0.111282
1947,40160,0.120224
1948,43631,0.15228
1949,30743,0.119341
1950,34307,0.153433
1951,30077,0.157644
1952,21377,0.126423
1953,16791,0.108086
1954,12988,0.0908582
1955,13914,0.102441
1956,14388,0.10665
1957,18490,0.146361
1958,16047,0.135595
1959,15521,0.137632
1960,11375,0.103826
1961,14101,0.130403
1962,14134,0.133545
1963,10046,0.095534
1964,8313,0.0782543
1965,8057,0.0752194
1966,8569,0.0750875
1967,10864,0.0923945
1968,6777,0.0549174
1969,12455,0.0908811
1970,16741,0.111122
1971,20034,0.142368
1972,19095,0.154785
1973,17360,0.158151
1974,10471,0.107815
1975,10572,0.122071
1976,10696,0.145461
1977,13223,0.182835
1978,14083,0.213977
1979,14755,0.285058
1980,10183,0.238084
1981,7915,0.253159
1982,6903,0.289216
1983,5328,0.206181
1984,4793,0.171245
1985,4282,0.172338
1986,2929,0.125119
1987,1894,0.0875796
1988,1177,0.053658
1989,637,0.0273829
1990,601,0.0235014
1991,525,0.0192709
1992,849,0.0305279
1993,800,0.0276956
1994,440,0.013568
1995,440,0.0120366
1996,322,0.00784523
1997,251,0.00477588
1998,320,0.0045685
1999,353,0.0042469
2000,319,0.00317398
2001,360,0.00301625
2002,368,0.00277795
2003,361,0.00243967
2004,398,0.00238717