| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 2.5 | 吨/公顷 | 2026-9 |
| 1997/1998 | 2.75 | 吨/公顷 | 2026-9 |
| 1996/1997 | 2.556 | 吨/公顷 | 2026-9 |
| 1995/1996 | 4 | 吨/公顷 | 2026-9 |
| 1994/1995 | 3 | 吨/公顷 | 2026-9 |
| 1993/1994 | 2 | 吨/公顷 | 2026-9 |
| 1992/1993 | 2.375 | 吨/公顷 | 2026-9 |
| 1991/1992 | 1.409 | 吨/公顷 | 2026-9 |
| 1990/1991 | 1.7 | 吨/公顷 | 2026-9 |
| 1989/1990 | 1.388 | 吨/公顷 | 2026-9 |
| 1988/1989 | 3.333 | 吨/公顷 | 2026-9 |
| 1987/1988 | 3.277 | 吨/公顷 | 2026-9 |
| 1986/1987 | 3.933 | 吨/公顷 | 2026-9 |
| 1985/1986 | 3.632 | 吨/公顷 | 2026-9 |
| 1984/1985 | 3.364 | 吨/公顷 | 2026-9 |
| 1983/1984 | 3.036 | 吨/公顷 | 2026-9 |
| 1982/1983 | 2.191 | 吨/公顷 | 2026-9 |
| 1981/1982 | 2.45 | 吨/公顷 | 2026-9 |
| 1980/1981 | 1.9 | 吨/公顷 | 2026-9 |
| 1979/1980 | 2.609 | 吨/公顷 | 2026-9 |
| 1978/1979 | 2.636 | 吨/公顷 | 2026-9 |
| 1977/1978 | 2.4 | 吨/公顷 | 2026-9 |
| 1976/1977 | 1.762 | 吨/公顷 | 2026-9 |
| 1975/1976 | 3.091 | 吨/公顷 | 2026-9 |
| 1974/1975 | 2.261 | 吨/公顷 | 2026-9 |
| 1973/1974 | 2.174 | 吨/公顷 | 2026-9 |
| 1972/1973 | 1.667 | 吨/公顷 | 2026-9 |
| 1971/1972 | 2.357 | 吨/公顷 | 2026-9 |
| 1970/1971 | 2.321 | 吨/公顷 | 2026-9 |
| 1969/1970 | 2.345 | 吨/公顷 | 2026-9 |
| 1968/1969 | 2.4 | 吨/公顷 | 2026-9 |
| 1967/1968 | 3.091 | 吨/公顷 | 2026-9 |
| 1966/1967 | 2.8 | 吨/公顷 | 2026-9 |
| 1965/1966 | 2.421 | 吨/公顷 | 2026-9 |
| 1964/1965 | 2.7 | 吨/公顷 | 2026-9 |
| 1963/1964 | 3.643 | 吨/公顷 | 2026-9 |
| 1962/1963 | 3.333 | 吨/公顷 | 2026-9 |
| 1961/1962 | 2.818 | 吨/公顷 | 2026-9 |
| 1960/1961 | 2.333 | 吨/公顷 | 2026-9 |