| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 1.556 | 吨/公顷 | 2026-9 |
| 1997/1998 | 1.65 | 吨/公顷 | 2026-9 |
| 1996/1997 | 1.318 | 吨/公顷 | 2026-9 |
| 1995/1996 | 1.69 | 吨/公顷 | 2026-9 |
| 1994/1995 | 1.422 | 吨/公顷 | 2026-9 |
| 1993/1994 | 1.528 | 吨/公顷 | 2026-9 |
| 1992/1993 | 1.579 | 吨/公顷 | 2026-9 |
| 1991/1992 | 1.229 | 吨/公顷 | 2026-9 |
| 1990/1991 | 1.625 | 吨/公顷 | 2026-9 |
| 1989/1990 | 1.321 | 吨/公顷 | 2026-9 |
| 1988/1989 | 2.133 | 吨/公顷 | 2026-9 |
| 1987/1988 | 1.429 | 吨/公顷 | 2026-9 |
| 1986/1987 | 2.143 | 吨/公顷 | 2026-9 |
| 1985/1986 | 1.417 | 吨/公顷 | 2026-9 |
| 1984/1985 | 1.403 | 吨/公顷 | 2026-9 |
| 1983/1984 | 1.143 | 吨/公顷 | 2026-9 |
| 1982/1983 | 1.034 | 吨/公顷 | 2026-9 |
| 1981/1982 | 1.048 | 吨/公顷 | 2026-9 |
| 1980/1981 | 0.922 | 吨/公顷 | 2026-9 |
| 1979/1980 | 1 | 吨/公顷 | 2026-9 |
| 1978/1979 | 1.188 | 吨/公顷 | 2026-9 |
| 1977/1978 | 1.13 | 吨/公顷 | 2026-9 |
| 1976/1977 | 1.222 | 吨/公顷 | 2026-9 |
| 1975/1976 | 0.814 | 吨/公顷 | 2026-9 |
| 1974/1975 | 1.071 | 吨/公顷 | 2026-9 |
| 1973/1974 | 0.971 | 吨/公顷 | 2026-9 |
| 1972/1973 | 0.917 | 吨/公顷 | 2026-9 |
| 1971/1972 | 1.258 | 吨/公顷 | 2026-9 |
| 1970/1971 | 0.893 | 吨/公顷 | 2026-9 |
| 1969/1970 | 1.046 | 吨/公顷 | 2026-9 |
| 1968/1969 | 0.864 | 吨/公顷 | 2026-9 |
| 1967/1968 | 1.284 | 吨/公顷 | 2026-9 |
| 1966/1967 | 1.232 | 吨/公顷 | 2026-9 |
| 1965/1966 | 1.069 | 吨/公顷 | 2026-9 |
| 1964/1965 | 0.888 | 吨/公顷 | 2026-9 |
| 1963/1964 | 0.954 | 吨/公顷 | 2026-9 |
| 1962/1963 | 0.96 | 吨/公顷 | 2026-9 |
| 1961/1962 | 1.127 | 吨/公顷 | 2026-9 |
| 1960/1961 | 1.052 | 吨/公顷 | 2026-9 |