| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 1.613 | 吨/公顷 | 2026-9 |
| 1997/1998 | 1.317 | 吨/公顷 | 2026-9 |
| 1996/1997 | 1.171 | 吨/公顷 | 2026-9 |
| 1995/1996 | 1.306 | 吨/公顷 | 2026-9 |
| 1994/1995 | 1.585 | 吨/公顷 | 2026-9 |
| 1993/1994 | 1.5 | 吨/公顷 | 2026-9 |
| 1992/1993 | 1.5 | 吨/公顷 | 2026-9 |
| 1991/1992 | 1.346 | 吨/公顷 | 2026-9 |
| 1990/1991 | 1.731 | 吨/公顷 | 2026-9 |
| 1989/1990 | 1.731 | 吨/公顷 | 2026-9 |
| 1988/1989 | 1.963 | 吨/公顷 | 2026-9 |
| 1987/1988 | 1.464 | 吨/公顷 | 2026-9 |
| 1986/1987 | 1.5 | 吨/公顷 | 2026-9 |
| 1985/1986 | 1.414 | 吨/公顷 | 2026-9 |
| 1984/1985 | 1.087 | 吨/公顷 | 2026-9 |
| 1983/1984 | 0.882 | 吨/公顷 | 2026-9 |
| 1982/1983 | 1.163 | 吨/公顷 | 2026-9 |
| 1981/1982 | 1.348 | 吨/公顷 | 2026-9 |
| 1980/1981 | 1.286 | 吨/公顷 | 2026-9 |
| 1979/1980 | 1.245 | 吨/公顷 | 2026-9 |
| 1978/1979 | 1.49 | 吨/公顷 | 2026-9 |
| 1977/1978 | 1.544 | 吨/公顷 | 2026-9 |
| 1976/1977 | 1.477 | 吨/公顷 | 2026-9 |
| 1975/1976 | 1.12 | 吨/公顷 | 2026-9 |
| 1974/1975 | 1.426 | 吨/公顷 | 2026-9 |
| 1973/1974 | 1.109 | 吨/公顷 | 2026-9 |
| 1972/1973 | 1.154 | 吨/公顷 | 2026-9 |
| 1971/1972 | 1.36 | 吨/公顷 | 2026-9 |
| 1970/1971 | 1.38 | 吨/公顷 | 2026-9 |
| 1969/1970 | 1.026 | 吨/公顷 | 2026-9 |
| 1968/1969 | 0.792 | 吨/公顷 | 2026-9 |
| 1967/1968 | 1.408 | 吨/公顷 | 2026-9 |
| 1966/1967 | 1.611 | 吨/公顷 | 2026-9 |
| 1965/1966 | 0.874 | 吨/公顷 | 2026-9 |
| 1964/1965 | 1.146 | 吨/公顷 | 2026-9 |
| 1963/1964 | 1 | 吨/公顷 | 2026-9 |
| 1962/1963 | 0.75 | 吨/公顷 | 2026-9 |
| 1961/1962 | 1.294 | 吨/公顷 | 2026-9 |
| 1960/1961 | 1.211 | 吨/公顷 | 2026-9 |