| 年度 | 数值 | 单位 | 发布日期 |
|---|---|---|---|
| 1990/1991 | 1140 | 千公顷 | 2026-9 |
| 1989/1990 | 907 | 千公顷 | 2026-9 |
| 1988/1989 | 951 | 千公顷 | 2026-9 |
| 1987/1988 | 965 | 千公顷 | 2026-9 |
| 1986/1987 | 849 | 千公顷 | 2026-9 |
| 1985/1986 | 591 | 千公顷 | 2026-9 |
| 1984/1985 | 476 | 千公顷 | 2026-9 |
| 1983/1984 | 416 | 千公顷 | 2026-9 |
| 1982/1983 | 283 | 千公顷 | 2026-9 |
| 1981/1982 | 155 | 千公顷 | 2026-9 |
| 1980/1981 | 98 | 千公顷 | 2026-9 |
| 1979/1980 | 83 | 千公顷 | 2026-9 |
| 1978/1979 | 39 | 千公顷 | 2026-9 |
| 1977/1978 | 38 | 千公顷 | 2026-9 |
| 1976/1977 | 45 | 千公顷 | 2026-9 |
| 1975/1976 | 61 | 千公顷 | 2026-9 |
| 1974/1975 | 39 | 千公顷 | 2026-9 |
| 1973/1974 | 38 | 千公顷 | 2026-9 |
| 1972/1973 | 44 | 千公顷 | 2026-9 |