| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 4.524 | 吨/公顷 | 2026-9 |
| 1997/1998 | 4.437 | 吨/公顷 | 2026-9 |
| 1996/1997 | 4.547 | 吨/公顷 | 2026-9 |
| 1995/1996 | 4.058 | 吨/公顷 | 2026-9 |
| 1994/1995 | 3.981 | 吨/公顷 | 2026-9 |
| 1993/1994 | 4.191 | 吨/公顷 | 2026-9 |
| 1992/1993 | 3.763 | 吨/公顷 | 2026-9 |
| 1991/1992 | 4.271 | 吨/公顷 | 2026-9 |
| 1990/1991 | 4.138 | 吨/公顷 | 2026-9 |
| 1989/1990 | 4.046 | 吨/公顷 | 2026-9 |
| 1988/1989 | 4.05 | 吨/公顷 | 2026-9 |
| 1987/1988 | 3.82 | 吨/公顷 | 2026-9 |
| 1986/1987 | 3.733 | 吨/公顷 | 2026-9 |
| 1985/1986 | 4.003 | 吨/公顷 | 2026-9 |
| 1984/1985 | 4.344 | 吨/公顷 | 2026-9 |
| 1983/1984 | 3.446 | 吨/公顷 | 2026-9 |
| 1982/1983 | 3.622 | 吨/公顷 | 2026-9 |
| 1981/1982 | 3.282 | 吨/公顷 | 2026-9 |
| 1980/1981 | 3.719 | 吨/公顷 | 2026-9 |
| 1979/1980 | 3.369 | 吨/公顷 | 2026-9 |
| 1978/1979 | 3.623 | 吨/公顷 | 2026-9 |
| 1977/1978 | 3.394 | 吨/公顷 | 2026-9 |
| 1976/1977 | 2.969 | 吨/公顷 | 2026-9 |
| 1975/1976 | 3.178 | 吨/公顷 | 2026-9 |
| 1974/1975 | 3.423 | 吨/公顷 | 2026-9 |
| 1973/1974 | 3.267 | 吨/公顷 | 2026-9 |
| 1972/1973 | 3.352 | 吨/公顷 | 2026-9 |
| 1971/1972 | 3.252 | 吨/公顷 | 2026-9 |
| 1970/1971 | 2.761 | 吨/公顷 | 2026-9 |
| 1969/1970 | 3.073 | 吨/公顷 | 2026-9 |
| 1968/1969 | 3.098 | 吨/公顷 | 2026-9 |
| 1967/1968 | 3.224 | 吨/公顷 | 2026-9 |
| 1966/1967 | 2.844 | 吨/公顷 | 2026-9 |
| 1965/1966 | 2.949 | 吨/公顷 | 2026-9 |
| 1964/1965 | 2.948 | 吨/公顷 | 2026-9 |
| 1963/1964 | 2.788 | 吨/公顷 | 2026-9 |
| 1962/1963 | 2.825 | 吨/公顷 | 2026-9 |
| 1961/1962 | 2.423 | 吨/公顷 | 2026-9 |
| 1960/1961 | 2.611 | 吨/公顷 | 2026-9 |