| 年度 | 数值 | 单位 | 发布时间 |
|---|
| 1991/1992 | 5.476 | 吨/公顷 | 2026-9 |
| 1990/1991 | 3.017 | 吨/公顷 | 2026-9 |
| 1989/1990 | 4.151 | 吨/公顷 | 2026-9 |
| 1988/1989 | 3.392 | 吨/公顷 | 2026-9 |
| 1987/1988 | 3.996 | 吨/公顷 | 2026-9 |
| 1986/1987 | 5.288 | 吨/公顷 | 2026-9 |
| 1985/1986 | 4.123 | 吨/公顷 | 2026-9 |
| 1984/1985 | 4.845 | 吨/公顷 | 2026-9 |
| 1983/1984 | 4.735 | 吨/公顷 | 2026-9 |
| 1982/1983 | 4.954 | 吨/公顷 | 2026-9 |
| 1981/1982 | 4.27 | 吨/公顷 | 2026-9 |
| 1980/1981 | 4.231 | 吨/公顷 | 2026-9 |
| 1979/1980 | 4.48 | 吨/公顷 | 2026-9 |
| 1978/1979 | 3.561 | 吨/公顷 | 2026-9 |
| 1977/1978 | 4.253 | 吨/公顷 | 2026-9 |
| 1976/1977 | 3.836 | 吨/公顷 | 2026-9 |
| 1975/1976 | 3.973 | 吨/公顷 | 2026-9 |
| 1974/1975 | 3.559 | 吨/公顷 | 2026-9 |
| 1973/1974 | 3.471 | 吨/公顷 | 2026-9 |
| 1972/1973 | 3.328 | 吨/公顷 | 2026-9 |
| 1971/1972 | 3.073 | 吨/公顷 | 2026-9 |
| 1970/1971 | 2.948 | 吨/公顷 | 2026-9 |
| 1969/1970 | 3.263 | 吨/公顷 | 2026-9 |
| 1968/1969 | 2.768 | 吨/公顷 | 2026-9 |
| 1967/1968 | 2.869 | 吨/公顷 | 2026-9 |
| 1966/1967 | 3.192 | 吨/公顷 | 2026-9 |
| 1965/1966 | 2.322 | 吨/公顷 | 2026-9 |
| 1964/1965 | 2.864 | 吨/公顷 | 2026-9 |
| 1963/1964 | 2.232 | 吨/公顷 | 2026-9 |
| 1962/1963 | 2.142 | 吨/公顷 | 2026-9 |
| 1961/1962 | 1.813 | 吨/公顷 | 2026-9 |
| 1960/1961 | 2.397 | 吨/公顷 | 2026-9 |