| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 2.255 | 吨/公顷 | 2026-9 |
| 1997/1998 | 3.062 | 吨/公顷 | 2026-9 |
| 1996/1997 | 2.22 | 吨/公顷 | 2026-9 |
| 1995/1996 | 2.983 | 吨/公顷 | 2026-9 |
| 1994/1995 | 2.118 | 吨/公顷 | 2026-9 |
| 1993/1994 | 2.422 | 吨/公顷 | 2026-9 |
| 1992/1993 | 2.672 | 吨/公顷 | 2026-9 |
| 1991/1992 | 2.892 | 吨/公顷 | 2026-9 |
| 1990/1991 | 3.573 | 吨/公顷 | 2026-9 |
| 1989/1990 | 4.479 | 吨/公顷 | 2026-9 |
| 1988/1989 | 4 | 吨/公顷 | 2026-9 |
| 1987/1988 | 3.214 | 吨/公顷 | 2026-9 |
| 1986/1987 | 3.391 | 吨/公顷 | 2026-9 |
| 1985/1986 | 2.721 | 吨/公顷 | 2026-9 |
| 1984/1985 | 3.643 | 吨/公顷 | 2026-9 |
| 1983/1984 | 2.96 | 吨/公顷 | 2026-9 |
| 1982/1983 | 3.237 | 吨/公顷 | 2026-9 |
| 1981/1982 | 2.804 | 吨/公顷 | 2026-9 |
| 1980/1981 | 3.044 | 吨/公顷 | 2026-9 |
| 1979/1980 | 2.644 | 吨/公顷 | 2026-9 |
| 1978/1979 | 3.195 | 吨/公顷 | 2026-9 |
| 1977/1978 | 3.124 | 吨/公顷 | 2026-9 |
| 1976/1977 | 3.002 | 吨/公顷 | 2026-9 |
| 1975/1976 | 2.154 | 吨/公顷 | 2026-9 |
| 1974/1975 | 2.279 | 吨/公顷 | 2026-9 |
| 1973/1974 | 2.318 | 吨/公顷 | 2026-9 |
| 1972/1973 | 2.566 | 吨/公顷 | 2026-9 |
| 1971/1972 | 2.391 | 吨/公顷 | 2026-9 |
| 1970/1971 | 1.785 | 吨/公顷 | 2026-9 |
| 1969/1970 | 1.766 | 吨/公顷 | 2026-9 |
| 1968/1969 | 2.021 | 吨/公顷 | 2026-9 |
| 1967/1968 | 2.066 | 吨/公顷 | 2026-9 |
| 1966/1967 | 1.963 | 吨/公顷 | 2026-9 |
| 1965/1966 | 2.082 | 吨/公顷 | 2026-9 |
| 1964/1965 | 1.776 | 吨/公顷 | 2026-9 |
| 1963/1964 | 1.567 | 吨/公顷 | 2026-9 |
| 1962/1963 | 1.676 | 吨/公顷 | 2026-9 |
| 1961/1962 | 1.648 | 吨/公顷 | 2026-9 |
| 1960/1961 | 1.523 | 吨/公顷 | 2026-9 |