| 年度 | 数值 | 单位 | 发布时间 |
|---|
| 1998/1999 | 8.537 | 吨/公顷 | 2026-9 |
| 1997/1998 | 9.02 | 吨/公顷 | 2026-9 |
| 1996/1997 | 8.474 | 吨/公顷 | 2026-9 |
| 1995/1996 | 7.864 | 吨/公顷 | 2026-9 |
| 1994/1995 | 7.556 | 吨/公顷 | 2026-9 |
| 1993/1994 | 7.938 | 吨/公顷 | 2026-9 |
| 1992/1993 | 7.674 | 吨/公顷 | 2026-9 |
| 1991/1992 | 7.003 | 吨/公顷 | 2026-9 |
| 1990/1991 | 6.514 | 吨/公顷 | 2026-9 |
| 1989/1990 | 6.954 | 吨/公顷 | 2026-9 |
| 1988/1989 | 7.179 | 吨/公顷 | 2026-9 |
| 1987/1988 | 7.063 | 吨/公顷 | 2026-9 |
| 1986/1987 | 6.623 | 吨/公顷 | 2026-9 |
| 1985/1986 | 6.688 | 吨/公顷 | 2026-9 |
| 1984/1985 | 6.19 | 吨/公顷 | 2026-9 |
| 1983/1984 | 6.085 | 吨/公顷 | 2026-9 |
| 1982/1983 | 6.093 | 吨/公顷 | 2026-9 |
| 1981/1982 | 5.811 | 吨/公顷 | 2026-9 |
| 1980/1981 | 5.401 | 吨/公顷 | 2026-9 |
| 1979/1980 | 5.265 | 吨/公顷 | 2026-9 |
| 1978/1979 | 5.166 | 吨/公顷 | 2026-9 |
| 1977/1978 | 5.151 | 吨/公顷 | 2026-9 |
| 1976/1977 | 4.247 | 吨/公顷 | 2026-9 |
| 1975/1976 | 4.36 | 吨/公顷 | 2026-9 |
| 1974/1975 | 4.476 | 吨/公顷 | 2026-9 |
| 1973/1974 | 4.93 | 吨/公顷 | 2026-9 |
| 1972/1973 | 4.203 | 吨/公顷 | 2026-9 |
| 1971/1972 | 4.489 | 吨/公顷 | 2026-9 |
| 1970/1971 | 4.407 | 吨/公顷 | 2026-9 |
| 1969/1970 | 4.003 | 吨/公顷 | 2026-9 |
| 1968/1969 | 3.849 | 吨/公顷 | 2026-9 |
| 1967/1968 | 3.34 | 吨/公顷 | 2026-9 |
| 1966/1967 | 3.271 | 吨/公顷 | 2026-9 |
| 1965/1966 | 2.88 | 吨/公顷 | 2026-9 |
| 1964/1965 | 2.624 | 吨/公顷 | 2026-9 |
| 1963/1964 | 2.959 | 吨/公顷 | 2026-9 |
| 1962/1963 | 2.253 | 吨/公顷 | 2026-9 |
| 1961/1962 | 2.542 | 吨/公顷 | 2026-9 |
| 1960/1961 | 2.71 | 吨/公顷 | 2026-9 |