| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1992/1993 | 2.517 | 吨/公顷 | 2026-9 |
| 1991/1992 | 2.697 | 吨/公顷 | 2026-9 |
| 1990/1991 | 2.774 | 吨/公顷 | 2026-9 |
| 1989/1990 | 2.91 | 吨/公顷 | 2026-9 |
| 1988/1989 | 2.923 | 吨/公顷 | 2026-9 |
| 1987/1988 | 2.633 | 吨/公顷 | 2026-9 |
| 1986/1987 | 2.529 | 吨/公顷 | 2026-9 |
| 1985/1986 | 2.436 | 吨/公顷 | 2026-9 |
| 1984/1985 | 2.655 | 吨/公顷 | 2026-9 |
| 1983/1984 | 2.661 | 吨/公顷 | 2026-9 |
| 1982/1983 | 1.835 | 吨/公顷 | 2026-9 |
| 1981/1982 | 2.105 | 吨/公顷 | 2026-9 |
| 1980/1981 | 2.352 | 吨/公顷 | 2026-9 |
| 1979/1980 | 1.455 | 吨/公顷 | 2026-9 |
| 1978/1979 | 2.101 | 吨/公顷 | 2026-9 |
| 1977/1978 | 2.219 | 吨/公顷 | 2026-9 |
| 1976/1977 | 2.127 | 吨/公顷 | 2026-9 |
| 1975/1976 | 2.079 | 吨/公顷 | 2026-9 |
| 1974/1975 | 2.089 | 吨/公顷 | 2026-9 |
| 1973/1974 | 2.053 | 吨/公顷 | 2026-9 |
| 1972/1973 | 2.019 | 吨/公顷 | 2026-9 |
| 1971/1972 | 1.942 | 吨/公顷 | 2026-9 |
| 1970/1971 | 1.8 | 吨/公顷 | 2026-9 |
| 1969/1970 | 1.371 | 吨/公顷 | 2026-9 |
| 1968/1969 | 1.404 | 吨/公顷 | 2026-9 |
| 1967/1968 | 1.735 | 吨/公顷 | 2026-9 |
| 1966/1967 | 1.625 | 吨/公顷 | 2026-9 |
| 1965/1966 | 1.451 | 吨/公顷 | 2026-9 |
| 1964/1965 | 0.958 | 吨/公顷 | 2026-9 |