| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 6.603 | 吨/公顷 | 2026-9 |
| 1997/1998 | 6.37 | 吨/公顷 | 2026-9 |
| 1996/1997 | 6.099 | 吨/公顷 | 2026-9 |
| 1995/1996 | 5.646 | 吨/公顷 | 2026-9 |
| 1994/1995 | 5.731 | 吨/公顷 | 2026-9 |
| 1993/1994 | 5.749 | 吨/公顷 | 2026-9 |
| 1992/1993 | 6.03 | 吨/公顷 | 2026-9 |
| 1991/1992 | 6.196 | 吨/公顷 | 2026-9 |
| 1990/1991 | 6.418 | 吨/公顷 | 2026-9 |
| 1989/1990 | 6.248 | 吨/公顷 | 2026-9 |
| 1988/1989 | 5.625 | 吨/公顷 | 2026-9 |
| 1987/1988 | 5.824 | 吨/公顷 | 2026-9 |
| 1986/1987 | 5.764 | 吨/公顷 | 2026-9 |
| 1985/1986 | 6.189 | 吨/公顷 | 2026-9 |
| 1984/1985 | 5.546 | 吨/公顷 | 2026-9 |
| 1983/1984 | 5.421 | 吨/公顷 | 2026-9 |
| 1982/1983 | 5.339 | 吨/公顷 | 2026-9 |
| 1981/1982 | 5.676 | 吨/公顷 | 2026-9 |
| 1980/1981 | 5.505 | 吨/公顷 | 2026-9 |
| 1979/1980 | 5.856 | 吨/公顷 | 2026-9 |
| 1978/1979 | 5.044 | 吨/公顷 | 2026-9 |
| 1977/1978 | 4.142 | 吨/公顷 | 2026-9 |
| 1976/1977 | 5.159 | 吨/公顷 | 2026-9 |
| 1975/1976 | 5.605 | 吨/公顷 | 2026-9 |
| 1974/1975 | 5.348 | 吨/公顷 | 2026-9 |
| 1973/1974 | 5.401 | 吨/公顷 | 2026-9 |
| 1972/1973 | 4.347 | 吨/公顷 | 2026-9 |
| 1971/1972 | 5 | 吨/公顷 | 2026-9 |
| 1970/1971 | 4.943 | 吨/公顷 | 2026-9 |
| 1969/1970 | 5.252 | 吨/公顷 | 2026-9 |
| 1968/1969 | 4.525 | 吨/公顷 | 2026-9 |
| 1967/1968 | 5.221 | 吨/公顷 | 2026-9 |
| 1966/1967 | 4.908 | 吨/公顷 | 2026-9 |
| 1965/1966 | 4.38 | 吨/公顷 | 2026-9 |
| 1964/1965 | 5.17 | 吨/公顷 | 2026-9 |
| 1963/1964 | 5.011 | 吨/公顷 | 2026-9 |
| 1962/1963 | 5.325 | 吨/公顷 | 2026-9 |
| 1961/1962 | 5.365 | 吨/公顷 | 2026-9 |
| 1960/1961 | 4.627 | 吨/公顷 | 2026-9 |