| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 3.582 | 吨/公顷 | 2026-9 |
| 1997/1998 | 3.73 | 吨/公顷 | 2026-9 |
| 1996/1997 | 2.853 | 吨/公顷 | 2026-9 |
| 1995/1996 | 3.583 | 吨/公顷 | 2026-9 |
| 1994/1995 | 3.664 | 吨/公顷 | 2026-9 |
| 1993/1994 | 2.897 | 吨/公顷 | 2026-9 |
| 1992/1993 | 3.588 | 吨/公顷 | 2026-9 |
| 1991/1992 | 4.344 | 吨/公顷 | 2026-9 |
| 1990/1991 | 4.572 | 吨/公顷 | 2026-9 |
| 1989/1990 | 4.678 | 吨/公顷 | 2026-9 |
| 1988/1989 | 4.432 | 吨/公顷 | 2026-9 |
| 1987/1988 | 3.873 | 吨/公顷 | 2026-9 |
| 1986/1987 | 3.387 | 吨/公顷 | 2026-9 |
| 1985/1986 | 3.749 | 吨/公顷 | 2026-9 |
| 1984/1985 | 4.474 | 吨/公顷 | 2026-9 |
| 1983/1984 | 3.639 | 吨/公顷 | 2026-9 |
| 1982/1983 | 3.302 | 吨/公顷 | 2026-9 |
| 1981/1982 | 3.157 | 吨/公顷 | 2026-9 |
| 1980/1981 | 3.776 | 吨/公顷 | 2026-9 |
| 1979/1980 | 2.699 | 吨/公顷 | 2026-9 |
| 1978/1979 | 3.378 | 吨/公顷 | 2026-9 |
| 1977/1978 | 3.152 | 吨/公顷 | 2026-9 |
| 1976/1977 | 3.276 | 吨/公顷 | 2026-9 |
| 1975/1976 | 2.72 | 吨/公顷 | 2026-9 |
| 1974/1975 | 3.299 | 吨/公顷 | 2026-9 |
| 1973/1974 | 3.035 | 吨/公顷 | 2026-9 |
| 1972/1973 | 2.756 | 吨/公顷 | 2026-9 |
| 1971/1972 | 2.624 | 吨/公顷 | 2026-9 |
| 1970/1971 | 1.944 | 吨/公顷 | 2026-9 |
| 1969/1970 | 2.383 | 吨/公顷 | 2026-9 |
| 1968/1969 | 2.342 | 吨/公顷 | 2026-9 |
| 1967/1968 | 2.085 | 吨/公顷 | 2026-9 |
| 1966/1967 | 1.869 | 吨/公顷 | 2026-9 |
| 1965/1966 | 2.02 | 吨/公顷 | 2026-9 |
| 1964/1965 | 1.567 | 吨/公顷 | 2026-9 |
| 1963/1964 | 1.788 | 吨/公顷 | 2026-9 |
| 1962/1963 | 2.088 | 吨/公顷 | 2026-9 |
| 1961/1962 | 1.885 | 吨/公顷 | 2026-9 |
| 1960/1961 | 1.941 | 吨/公顷 | 2026-9 |