| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 2.64 | 吨/公顷 | 2026-9 |
| 1997/1998 | 3.058 | 吨/公顷 | 2026-9 |
| 1996/1997 | 1.758 | 吨/公顷 | 2026-9 |
| 1995/1996 | 3.182 | 吨/公顷 | 2026-9 |
| 1994/1995 | 2.559 | 吨/公顷 | 2026-9 |
| 1993/1994 | 2.304 | 吨/公顷 | 2026-9 |
| 1992/1993 | 2.066 | 吨/公顷 | 2026-9 |
| 1991/1992 | 2.518 | 吨/公顷 | 2026-9 |
| 1990/1991 | 3.231 | 吨/公顷 | 2026-9 |
| 1989/1990 | 3.388 | 吨/公顷 | 2026-9 |
| 1988/1989 | 3.5 | 吨/公顷 | 2026-9 |
| 1987/1988 | 2.5 | 吨/公顷 | 2026-9 |
| 1986/1987 | 2.648 | 吨/公顷 | 2026-9 |
| 1985/1986 | 2.406 | 吨/公顷 | 2026-9 |
| 1984/1985 | 3.211 | 吨/公顷 | 2026-9 |
| 1983/1984 | 2.339 | 吨/公顷 | 2026-9 |
| 1982/1983 | 3.006 | 吨/公顷 | 2026-9 |
| 1981/1982 | 2.519 | 吨/公顷 | 2026-9 |
| 1980/1981 | 2.864 | 吨/公顷 | 2026-9 |
| 1979/1980 | 2.222 | 吨/公顷 | 2026-9 |
| 1978/1979 | 2.736 | 吨/公顷 | 2026-9 |
| 1977/1978 | 2.848 | 吨/公顷 | 2026-9 |
| 1976/1977 | 2.816 | 吨/公顷 | 2026-9 |
| 1975/1976 | 2.073 | 吨/公顷 | 2026-9 |
| 1974/1975 | 2.094 | 吨/公顷 | 2026-9 |
| 1973/1974 | 2.329 | 吨/公顷 | 2026-9 |
| 1972/1973 | 2.398 | 吨/公顷 | 2026-9 |
| 1971/1972 | 2.237 | 吨/公顷 | 2026-9 |
| 1970/1971 | 1.446 | 吨/公顷 | 2026-9 |
| 1969/1970 | 1.576 | 吨/公顷 | 2026-9 |
| 1968/1969 | 1.721 | 吨/公顷 | 2026-9 |
| 1967/1968 | 1.998 | 吨/公顷 | 2026-9 |
| 1966/1967 | 1.669 | 吨/公顷 | 2026-9 |
| 1965/1966 | 1.99 | 吨/公顷 | 2026-9 |
| 1964/1965 | 1.292 | 吨/公顷 | 2026-9 |
| 1963/1964 | 1.311 | 吨/公顷 | 2026-9 |
| 1962/1963 | 1.332 | 吨/公顷 | 2026-9 |
| 1961/1962 | 1.344 | 吨/公顷 | 2026-9 |
| 1960/1961 | 1.217 | 吨/公顷 | 2026-9 |