| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 5.321 | 吨/公顷 | 2026-9 |
| 1997/1998 | 5.26 | 吨/公顷 | 2026-9 |
| 1996/1997 | 5.126 | 吨/公顷 | 2026-9 |
| 1995/1996 | 4.778 | 吨/公顷 | 2026-9 |
| 1994/1995 | 4.361 | 吨/公顷 | 2026-9 |
| 1993/1994 | 4.583 | 吨/公顷 | 2026-9 |
| 1992/1993 | 4.304 | 吨/公顷 | 2026-9 |
| 1991/1992 | 4.551 | 吨/公顷 | 2026-9 |
| 1990/1991 | 3.848 | 吨/公顷 | 2026-9 |
| 1989/1990 | 3.667 | 吨/公顷 | 2026-9 |
| 1988/1989 | 3.441 | 吨/公顷 | 2026-9 |
| 1987/1988 | 3.865 | 吨/公顷 | 2026-9 |
| 1986/1987 | 3.369 | 吨/公顷 | 2026-9 |
| 1985/1986 | 3.502 | 吨/公顷 | 2026-9 |
| 1984/1985 | 3.824 | 吨/公顷 | 2026-9 |
| 1983/1984 | 2.974 | 吨/公顷 | 2026-9 |
| 1982/1983 | 3.233 | 吨/公顷 | 2026-9 |
| 1981/1982 | 3.099 | 吨/公顷 | 2026-9 |
| 1980/1981 | 3.332 | 吨/公顷 | 2026-9 |
| 1979/1980 | 3.127 | 吨/公顷 | 2026-9 |
| 1978/1979 | 3.173 | 吨/公顷 | 2026-9 |
| 1977/1978 | 3.105 | 吨/公顷 | 2026-9 |
| 1976/1977 | 2.705 | 吨/公顷 | 2026-9 |
| 1975/1976 | 3.151 | 吨/公顷 | 2026-9 |
| 1974/1975 | 3.476 | 吨/公顷 | 2026-9 |
| 1973/1974 | 3.217 | 吨/公顷 | 2026-9 |
| 1972/1973 | 3.312 | 吨/公顷 | 2026-9 |
| 1971/1972 | 3.269 | 吨/公顷 | 2026-9 |
| 1970/1971 | 2.742 | 吨/公顷 | 2026-9 |
| 1969/1970 | 3.043 | 吨/公顷 | 2026-9 |
| 1968/1969 | 3.102 | 吨/公顷 | 2026-9 |
| 1967/1968 | 3.004 | 吨/公顷 | 2026-9 |
| 1966/1967 | 2.663 | 吨/公顷 | 2026-9 |
| 1965/1966 | 2.769 | 吨/公顷 | 2026-9 |
| 1964/1965 | 2.853 | 吨/公顷 | 2026-9 |
| 1963/1964 | 2.656 | 吨/公顷 | 2026-9 |
| 1962/1963 | 2.728 | 吨/公顷 | 2026-9 |
| 1961/1962 | 2.488 | 吨/公顷 | 2026-9 |
| 1960/1961 | 2.674 | 吨/公顷 | 2026-9 |