| 年度 | 数值 | 单位 | 发布时间 |
|---|
| 1998/1999 | 2.667 | 吨/公顷 | 2026-9 |
| 1997/1998 | 4.185 | 吨/公顷 | 2026-9 |
| 1996/1997 | 2.921 | 吨/公顷 | 2026-9 |
| 1995/1996 | 3.178 | 吨/公顷 | 2026-9 |
| 1994/1995 | 2.835 | 吨/公顷 | 2026-9 |
| 1993/1994 | 2.581 | 吨/公顷 | 2026-9 |
| 1992/1993 | 2.048 | 吨/公顷 | 2026-9 |
| 1991/1992 | 4.078 | 吨/公顷 | 2026-9 |
| 1990/1991 | 2.753 | 吨/公顷 | 2026-9 |
| 1989/1990 | 2.474 | 吨/公顷 | 2026-9 |
| 1988/1989 | 3.448 | 吨/公顷 | 2026-9 |
| 1987/1988 | 3.621 | 吨/公顷 | 2026-9 |
| 1986/1987 | 4 | 吨/公顷 | 2026-9 |
| 1985/1986 | 3.398 | 吨/公顷 | 2026-9 |
| 1984/1985 | 4.294 | 吨/公顷 | 2026-9 |
| 1983/1984 | 4.083 | 吨/公顷 | 2026-9 |
| 1982/1983 | 4.566 | 吨/公顷 | 2026-9 |
| 1981/1982 | 3.574 | 吨/公顷 | 2026-9 |
| 1980/1981 | 3.392 | 吨/公顷 | 2026-9 |
| 1979/1980 | 3.753 | 吨/公顷 | 2026-9 |
| 1978/1979 | 3.211 | 吨/公顷 | 2026-9 |
| 1977/1978 | 3.048 | 吨/公顷 | 2026-9 |
| 1976/1977 | 3.429 | 吨/公顷 | 2026-9 |
| 1975/1976 | 2.796 | 吨/公顷 | 2026-9 |
| 1974/1975 | 2.511 | 吨/公顷 | 2026-9 |
| 1973/1974 | 2.502 | 吨/公顷 | 2026-9 |
| 1972/1973 | 3.071 | 吨/公顷 | 2026-9 |
| 1971/1972 | 2.507 | 吨/公顷 | 2026-9 |
| 1970/1971 | 2.119 | 吨/公顷 | 2026-9 |
| 1969/1970 | 2.331 | 吨/公顷 | 2026-9 |
| 1968/1969 | 2.125 | 吨/公顷 | 2026-9 |
| 1967/1968 | 2.129 | 吨/公顷 | 2026-9 |
| 1966/1967 | 2.44 | 吨/公顷 | 2026-9 |
| 1965/1966 | 1.778 | 吨/公顷 | 2026-9 |
| 1964/1965 | 2.016 | 吨/公顷 | 2026-9 |
| 1963/1964 | 1.783 | 吨/公顷 | 2026-9 |
| 1962/1963 | 1.587 | 吨/公顷 | 2026-9 |
| 1961/1962 | 1.674 | 吨/公顷 | 2026-9 |
| 1960/1961 | 1.548 | 吨/公顷 | 2026-9 |