| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1990/1991 | 3.111 | 吨/公顷 | 2026-9 |
| 1989/1990 | 4.5 | 吨/公顷 | 2026-9 |
| 1988/1989 | 4.111 | 吨/公顷 | 2026-9 |
| 1987/1988 | 4.8 | 吨/公顷 | 2026-9 |
| 1986/1987 | 5.333 | 吨/公顷 | 2026-9 |
| 1985/1986 | 4.111 | 吨/公顷 | 2026-9 |
| 1984/1985 | 4.111 | 吨/公顷 | 2026-9 |
| 1983/1984 | 4.444 | 吨/公顷 | 2026-9 |
| 1982/1983 | 4.667 | 吨/公顷 | 2026-9 |
| 1981/1982 | 4.667 | 吨/公顷 | 2026-9 |
| 1980/1981 | 4.667 | 吨/公顷 | 2026-9 |
| 1979/1980 | 4.125 | 吨/公顷 | 2026-9 |
| 1978/1979 | 4.125 | 吨/公顷 | 2026-9 |
| 1977/1978 | 4.625 | 吨/公顷 | 2026-9 |
| 1976/1977 | 2.875 | 吨/公顷 | 2026-9 |
| 1975/1976 | 4.625 | 吨/公顷 | 2026-9 |
| 1974/1975 | 4.571 | 吨/公顷 | 2026-9 |
| 1973/1974 | 4.571 | 吨/公顷 | 2026-9 |
| 1972/1973 | 4.571 | 吨/公顷 | 2026-9 |
| 1971/1972 | 4.625 | 吨/公顷 | 2026-9 |
| 1970/1971 | 4 | 吨/公顷 | 2026-9 |
| 1969/1970 | 4 | 吨/公顷 | 2026-9 |
| 1968/1969 | 3.6 | 吨/公顷 | 2026-9 |
| 1967/1968 | 5 | 吨/公顷 | 2026-9 |
| 1966/1967 | 4.6 | 吨/公顷 | 2026-9 |
| 1965/1966 | 4.167 | 吨/公顷 | 2026-9 |
| 1964/1965 | 3.571 | 吨/公顷 | 2026-9 |
| 1963/1964 | 3.833 | 吨/公顷 | 2026-9 |
| 1962/1963 | 3.833 | 吨/公顷 | 2026-9 |
| 1961/1962 | 3.333 | 吨/公顷 | 2026-9 |
| 1960/1961 | 3.667 | 吨/公顷 | 2026-9 |