Year | Cropland | Pasture | Forest | Special | Urban | Other | Average |
1945 | 0.05505 | 0.18546 | 0.00490 | 0.02625 | 0.00890 | 0.00620 | 0.04577 |
1949 | 0.04435 | 0.25053 | 0.00592 | 0.01820 | 0.01521 | 0.09184 | 0.05995 |
1954 | 0.03529 | 0.16342 | 0.01272 | 0.02795 | 0.02240 | 0.07109 | 0.04852 |
1959 | 0.02669 | 0.09338 | 0.01233 | 0.02155 | 0.03002 | 0.13964 | 0.03744 |
1964 | 0.02673 | 0.10502 | 0.01460 | 0.04614 | 0.02960 | 0.07436 | 0.03800 |
1969 | 0.05572 | 0.12883 | 0.01182 | 0.06730 | 0.02985 | 0.02374 | 0.04397 |
1974 | 0.05586 | 0.13538 | 0.01135 | 0.06410 | 0.03502 | 0.03822 | 0.04592 |
1978 | 0.05767 | 0.17955 | 0.01339 | 0.06327 | 0.05940 | 0.05551 | 0.05549 |
1982 | 0.05281 | 0.14077 | 0.01222 | 0.06608 | 0.06464 | 0.03788 | 0.04817 |
1987 | 0.04995 | 0.14464 | 0.01655 | 0.08276 | 0.07652 | 0.03689 | 0.05273 |
1992 | 0.05694 | 0.17039 | 0.01837 | 0.06353 | 0.05142 | 0.03538 | 0.05651 |
1997 | 0.04364 | 0.18284 | 0.02141 | 0.11431 | 0.05778 | 0.00607 | 0.06121 |
2002 | 0.04675 | 0.18453 | 0.02094 | 0.10363 | 0.08290 | 0.01930 | 0.06242 |
2007 | 0.04271 | 0.16220 | 0.02943 | 0.12037 | 0.08390 | 0.05809 | 0.06962 |