| 年度 | 数值 | 单位 | 发布时间 |
|---|
| 1998/1999 | 3.158 | 吨/公顷 | 2026-9 |
| 1997/1998 | 3.333 | 吨/公顷 | 2026-9 |
| 1996/1997 | 2.366 | 吨/公顷 | 2026-9 |
| 1995/1996 | 3.256 | 吨/公顷 | 2026-9 |
| 1994/1995 | 2.822 | 吨/公顷 | 2026-9 |
| 1993/1994 | 1.594 | 吨/公顷 | 2026-9 |
| 1992/1993 | 2.631 | 吨/公顷 | 2026-9 |
| 1991/1992 | 4.955 | 吨/公顷 | 2026-9 |
| 1990/1991 | 3.103 | 吨/公顷 | 2026-9 |
| 1989/1990 | 4.3 | 吨/公顷 | 2026-9 |
| 1988/1989 | 3.178 | 吨/公顷 | 2026-9 |
| 1987/1988 | 3.738 | 吨/公顷 | 2026-9 |
| 1986/1987 | 4.97 | 吨/公顷 | 2026-9 |
| 1985/1986 | 3.103 | 吨/公顷 | 2026-9 |
| 1984/1985 | 5.524 | 吨/公顷 | 2026-9 |
| 1983/1984 | 5.227 | 吨/公顷 | 2026-9 |
| 1982/1983 | 5.504 | 吨/公顷 | 2026-9 |
| 1981/1982 | 4.265 | 吨/公顷 | 2026-9 |
| 1980/1981 | 3.863 | 吨/公顷 | 2026-9 |
| 1979/1980 | 4.839 | 吨/公顷 | 2026-9 |
| 1978/1979 | 3.721 | 吨/公顷 | 2026-9 |
| 1977/1978 | 3.58 | 吨/公顷 | 2026-9 |
| 1976/1977 | 4.146 | 吨/公顷 | 2026-9 |
| 1975/1976 | 4.328 | 吨/公顷 | 2026-9 |
| 1974/1975 | 3.109 | 吨/公顷 | 2026-9 |
| 1973/1974 | 4.124 | 吨/公顷 | 2026-9 |
| 1972/1973 | 4.316 | 吨/公顷 | 2026-9 |
| 1971/1972 | 3.844 | 吨/公顷 | 2026-9 |
| 1970/1971 | 3.74 | 吨/公顷 | 2026-9 |
| 1969/1970 | 4.178 | 吨/公顷 | 2026-9 |
| 1968/1969 | 3.174 | 吨/公顷 | 2026-9 |
| 1967/1968 | 3.476 | 吨/公顷 | 2026-9 |
| 1966/1967 | 3.843 | 吨/公顷 | 2026-9 |
| 1965/1966 | 2.231 | 吨/公顷 | 2026-9 |
| 1964/1965 | 3.125 | 吨/公顷 | 2026-9 |
| 1963/1964 | 2.624 | 吨/公顷 | 2026-9 |
| 1962/1963 | 2.39 | 吨/公顷 | 2026-9 |
| 1961/1962 | 2.243 | 吨/公顷 | 2026-9 |
| 1960/1961 | 2.374 | 吨/公顷 | 2026-9 |