| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1991/1992 | 89 | 千公顷 | 2026-9 |
| 1990/1991 | 93 | 千公顷 | 2026-9 |
| 1989/1990 | 103 | 千公顷 | 2026-9 |
| 1988/1989 | 102 | 千公顷 | 2026-9 |
| 1987/1988 | 108 | 千公顷 | 2026-9 |
| 1986/1987 | 115 | 千公顷 | 2026-9 |
| 1985/1986 | 121 | 千公顷 | 2026-9 |
| 1984/1985 | 129 | 千公顷 | 2026-9 |
| 1983/1984 | 147 | 千公顷 | 2026-9 |
| 1982/1983 | 161 | 千公顷 | 2026-9 |
| 1981/1982 | 147 | 千公顷 | 2026-9 |
| 1980/1981 | 121 | 千公顷 | 2026-9 |
| 1979/1980 | 149 | 千公顷 | 2026-9 |
| 1978/1979 | 151 | 千公顷 | 2026-9 |
| 1977/1978 | 174 | 千公顷 | 2026-9 |
| 1976/1977 | 198 | 千公顷 | 2026-9 |
| 1975/1976 | 221 | 千公顷 | 2026-9 |
| 1974/1975 | 225 | 千公顷 | 2026-9 |
| 1973/1974 | 279 | 千公顷 | 2026-9 |
| 1972/1973 | 323 | 千公顷 | 2026-9 |
| 1971/1972 | 344 | 千公顷 | 2026-9 |
| 1970/1971 | 378 | 千公顷 | 2026-9 |
| 1969/1970 | 400 | 千公顷 | 2026-9 |
| 1968/1969 | 409 | 千公顷 | 2026-9 |
| 1967/1968 | 433 | 千公顷 | 2026-9 |
| 1966/1967 | 389 | 千公顷 | 2026-9 |
| 1965/1966 | 375 | 千公顷 | 2026-9 |
| 1964/1965 | 394 | 千公顷 | 2026-9 |
| 1963/1964 | 409 | 千公顷 | 2026-9 |
| 1962/1963 | 448 | 千公顷 | 2026-9 |
| 1961/1962 | 465 | 千公顷 | 2026-9 |
| 1960/1961 | 504 | 千公顷 | 2026-9 |