| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1991/1992 | 3.888 | 吨/公顷 | 2026-9 |
| 1990/1991 | 4.527 | 吨/公顷 | 2026-9 |
| 1989/1990 | 3.204 | 吨/公顷 | 2026-9 |
| 1988/1989 | 3.588 | 吨/公顷 | 2026-9 |
| 1987/1988 | 3.759 | 吨/公顷 | 2026-9 |
| 1986/1987 | 3.644 | 吨/公顷 | 2026-9 |
| 1985/1986 | 3.909 | 吨/公顷 | 2026-9 |
| 1984/1985 | 3.713 | 吨/公顷 | 2026-9 |
| 1983/1984 | 3.218 | 吨/公顷 | 2026-9 |
| 1982/1983 | 3.031 | 吨/公顷 | 2026-9 |
| 1981/1982 | 2.932 | 吨/公顷 | 2026-9 |
| 1980/1981 | 3.479 | 吨/公顷 | 2026-9 |
| 1979/1980 | 2.711 | 吨/公顷 | 2026-9 |
| 1978/1979 | 3.013 | 吨/公顷 | 2026-9 |
| 1977/1978 | 2.609 | 吨/公顷 | 2026-9 |
| 1976/1977 | 1.914 | 吨/公顷 | 2026-9 |
| 1975/1976 | 2.674 | 吨/公顷 | 2026-9 |
| 1974/1975 | 3.053 | 吨/公顷 | 2026-9 |
| 1973/1974 | 2.652 | 吨/公顷 | 2026-9 |
| 1972/1973 | 2.248 | 吨/公顷 | 2026-9 |
| 1971/1972 | 2.622 | 吨/公顷 | 2026-9 |
| 1970/1971 | 2.053 | 吨/公顷 | 2026-9 |
| 1969/1970 | 2.423 | 吨/公顷 | 2026-9 |
| 1968/1969 | 2.125 | 吨/公顷 | 2026-9 |
| 1967/1968 | 2.236 | 吨/公顷 | 2026-9 |
| 1966/1967 | 1.918 | 吨/公顷 | 2026-9 |
| 1965/1966 | 1.68 | 吨/公顷 | 2026-9 |
| 1964/1965 | 1.698 | 吨/公顷 | 2026-9 |
| 1963/1964 | 1.949 | 吨/公顷 | 2026-9 |
| 1962/1963 | 2.02 | 吨/公顷 | 2026-9 |
| 1961/1962 | 2.062 | 吨/公顷 | 2026-9 |
| 1960/1961 | 2.024 | 吨/公顷 | 2026-9 |