| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 3.025 | 吨/公顷 | 2026-9 |
| 1997/1998 | 2.888 | 吨/公顷 | 2026-9 |
| 1996/1997 | 2.883 | 吨/公顷 | 2026-9 |
| 1995/1996 | 2.973 | 吨/公顷 | 2026-9 |
| 1994/1995 | 2.458 | 吨/公顷 | 2026-9 |
| 1993/1994 | 2.684 | 吨/公顷 | 2026-9 |
| 1992/1993 | 2.253 | 吨/公顷 | 2026-9 |
| 1991/1992 | 3.128 | 吨/公顷 | 2026-9 |
| 1990/1991 | 3.272 | 吨/公顷 | 2026-9 |
| 1989/1990 | 3.241 | 吨/公顷 | 2026-9 |
| 1988/1989 | 2.953 | 吨/公顷 | 2026-9 |
| 1987/1988 | 3.148 | 吨/公顷 | 2026-9 |
| 1986/1987 | 3.007 | 吨/公顷 | 2026-9 |
| 1985/1986 | 2.987 | 吨/公顷 | 2026-9 |
| 1984/1985 | 3.006 | 吨/公顷 | 2026-9 |
| 1983/1984 | 2.632 | 吨/公顷 | 2026-9 |
| 1982/1983 | 2.695 | 吨/公顷 | 2026-9 |
| 1981/1982 | 2.633 | 吨/公顷 | 2026-9 |
| 1980/1981 | 2.406 | 吨/公顷 | 2026-9 |
| 1979/1980 | 2.314 | 吨/公顷 | 2026-9 |
| 1978/1979 | 2.747 | 吨/公顷 | 2026-9 |
| 1977/1978 | 2.596 | 吨/公顷 | 2026-9 |
| 1976/1977 | 2.784 | 吨/公顷 | 2026-9 |
| 1975/1976 | 2.604 | 吨/公顷 | 2026-9 |
| 1974/1975 | 3.088 | 吨/公顷 | 2026-9 |
| 1973/1974 | 2.905 | 吨/公顷 | 2026-9 |
| 1972/1973 | 2.361 | 吨/公顷 | 2026-9 |
| 1971/1972 | 2.304 | 吨/公顷 | 2026-9 |
| 1970/1971 | 1.909 | 吨/公顷 | 2026-9 |
| 1969/1970 | 1.889 | 吨/公顷 | 2026-9 |
| 1968/1969 | 1.91 | 吨/公顷 | 2026-9 |
| 1967/1968 | 1.811 | 吨/公顷 | 2026-9 |
| 1966/1967 | 1.762 | 吨/公顷 | 2026-9 |
| 1965/1966 | 1.766 | 吨/公顷 | 2026-9 |
| 1964/1965 | 1.529 | 吨/公顷 | 2026-9 |
| 1963/1964 | 1.624 | 吨/公顷 | 2026-9 |
| 1962/1963 | 1.562 | 吨/公顷 | 2026-9 |
| 1961/1962 | 1.618 | 吨/公顷 | 2026-9 |
| 1960/1961 | 1.523 | 吨/公顷 | 2026-9 |