| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 973 | 千公顷 | 2026-9 |
| 1997/1998 | 914 | 千公顷 | 2026-9 |
| 1996/1997 | 799 | 千公顷 | 2026-9 |
| 1995/1996 | 644 | 千公顷 | 2026-9 |
| 1994/1995 | 587 | 千公顷 | 2026-9 |
| 1993/1994 | 578 | 千公顷 | 2026-9 |
| 1992/1993 | 562 | 千公顷 | 2026-9 |
| 1991/1992 | 506 | 千公顷 | 2026-9 |
| 1990/1991 | 283 | 千公顷 | 2026-9 |
| 1989/1990 | 414 | 千公顷 | 2026-9 |
| 1988/1989 | 222 | 千公顷 | 2026-9 |
| 1987/1988 | 326 | 千公顷 | 2026-9 |
| 1986/1987 | 317 | 千公顷 | 2026-9 |
| 1985/1986 | 307 | 千公顷 | 2026-9 |
| 1984/1985 | 306 | 千公顷 | 2026-9 |
| 1983/1984 | 272 | 千公顷 | 2026-9 |
| 1982/1983 | 344 | 千公顷 | 2026-9 |
| 1981/1982 | 292 | 千公顷 | 2026-9 |
| 1980/1981 | 283 | 千公顷 | 2026-9 |
| 1979/1980 | 300 | 千公顷 | 2026-9 |
| 1978/1979 | 323 | 千公顷 | 2026-9 |
| 1977/1978 | 621 | 千公顷 | 2026-9 |
| 1976/1977 | 678 | 千公顷 | 2026-9 |
| 1975/1976 | 784 | 千公顷 | 2026-9 |
| 1974/1975 | 795 | 千公顷 | 2026-9 |
| 1973/1974 | 865 | 千公顷 | 2026-9 |
| 1972/1973 | 914 | 千公顷 | 2026-9 |
| 1971/1972 | 958 | 千公顷 | 2026-9 |
| 1970/1971 | 1036 | 千公顷 | 2026-9 |
| 1969/1970 | 1105 | 千公顷 | 2026-9 |
| 1968/1969 | 1129 | 千公顷 | 2026-9 |
| 1967/1968 | 1159 | 千公顷 | 2026-9 |
| 1966/1967 | 1212 | 千公顷 | 2026-9 |
| 1965/1966 | 1237 | 千公顷 | 2026-9 |
| 1964/1965 | 1395 | 千公顷 | 2026-9 |
| 1963/1964 | 2660 | 千公顷 | 2026-9 |
| 1962/1963 | 1471 | 千公顷 | 2026-9 |
| 1961/1962 | 1456 | 千公顷 | 2026-9 |
| 1960/1961 | 1431 | 千公顷 | 2026-9 |