| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 4.546 | 吨/公顷 | 2026-9 |
| 1997/1998 | 4.216 | 吨/公顷 | 2026-9 |
| 1996/1997 | 3.269 | 吨/公顷 | 2026-9 |
| 1995/1996 | 4.259 | 吨/公顷 | 2026-9 |
| 1994/1995 | 4.589 | 吨/公顷 | 2026-9 |
| 1993/1994 | 3.051 | 吨/公顷 | 2026-9 |
| 1992/1993 | 4.061 | 吨/公顷 | 2026-9 |
| 1991/1992 | 5.215 | 吨/公顷 | 2026-9 |
| 1990/1991 | 5.496 | 吨/公顷 | 2026-9 |
| 1989/1990 | 5.241 | 吨/公顷 | 2026-9 |
| 1988/1989 | 5.445 | 吨/公顷 | 2026-9 |
| 1987/1988 | 4.418 | 吨/公顷 | 2026-9 |
| 1986/1987 | 4.395 | 吨/公顷 | 2026-9 |
| 1985/1986 | 4.844 | 吨/公顷 | 2026-9 |
| 1984/1985 | 5.413 | 吨/公顷 | 2026-9 |
| 1983/1984 | 4.404 | 吨/公顷 | 2026-9 |
| 1982/1983 | 4.39 | 吨/公顷 | 2026-9 |
| 1981/1982 | 4.009 | 吨/公顷 | 2026-9 |
| 1980/1981 | 4.763 | 吨/公顷 | 2026-9 |
| 1979/1980 | 3.263 | 吨/公顷 | 2026-9 |
| 1978/1979 | 4.285 | 吨/公顷 | 2026-9 |
| 1977/1978 | 4.054 | 吨/公顷 | 2026-9 |
| 1976/1977 | 3.882 | 吨/公顷 | 2026-9 |
| 1975/1976 | 3.201 | 吨/公顷 | 2026-9 |
| 1974/1975 | 3.752 | 吨/公顷 | 2026-9 |
| 1973/1974 | 3.476 | 吨/公顷 | 2026-9 |
| 1972/1973 | 3.105 | 吨/公顷 | 2026-9 |
| 1971/1972 | 3.075 | 吨/公顷 | 2026-9 |
| 1970/1971 | 2.133 | 吨/公顷 | 2026-9 |
| 1969/1970 | 2.709 | 吨/公顷 | 2026-9 |
| 1968/1969 | 2.531 | 吨/公顷 | 2026-9 |
| 1967/1968 | 2.605 | 吨/公顷 | 2026-9 |
| 1966/1967 | 2.192 | 吨/公顷 | 2026-9 |
| 1965/1966 | 2.096 | 吨/公顷 | 2026-9 |
| 1964/1965 | 1.794 | 吨/公顷 | 2026-9 |
| 1963/1964 | 1.515 | 吨/公顷 | 2026-9 |
| 1962/1963 | 1.789 | 吨/公顷 | 2026-9 |
| 1961/1962 | 1.909 | 吨/公顷 | 2026-9 |
| 1960/1961 | 1.682 | 吨/公顷 | 2026-9 |