| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1986/1987 | 621 | 千公顷 | 2026-9 |
| 1985/1986 | 671 | 千公顷 | 2026-9 |
| 1984/1985 | 688 | 千公顷 | 2026-9 |
| 1983/1984 | 700 | 千公顷 | 2026-9 |
| 1982/1983 | 648 | 千公顷 | 2026-9 |
| 1981/1982 | 634 | 千公顷 | 2026-9 |
| 1980/1981 | 666 | 千公顷 | 2026-9 |
| 1979/1980 | 610 | 千公顷 | 2026-9 |
| 1978/1979 | 580 | 千公顷 | 2026-9 |
| 1977/1978 | 548 | 千公顷 | 2026-9 |
| 1976/1977 | 522 | 千公顷 | 2026-9 |
| 1975/1976 | 500 | 千公顷 | 2026-9 |
| 1974/1975 | 495 | 千公顷 | 2026-9 |
| 1973/1974 | 462 | 千公顷 | 2026-9 |
| 1972/1973 | 421 | 千公顷 | 2026-9 |
| 1971/1972 | 390 | 千公顷 | 2026-9 |
| 1970/1971 | 350 | 千公顷 | 2026-9 |
| 1969/1970 | 328 | 千公顷 | 2026-9 |
| 1968/1969 | 312 | 千公顷 | 2026-9 |
| 1967/1968 | 281 | 千公顷 | 2026-9 |
| 1966/1967 | 248 | 千公顷 | 2026-9 |
| 1965/1966 | 217 | 千公顷 | 2026-9 |
| 1964/1965 | 191 | 千公顷 | 2026-9 |
| 1963/1964 | 147 | 千公顷 | 2026-9 |
| 1962/1963 | 119 | 千公顷 | 2026-9 |
| 1961/1962 | 118 | 千公顷 | 2026-9 |
| 1960/1961 | 95 | 千公顷 | 2026-9 |