| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 2.679 | 吨/公顷 | 2026-9 |
| 1997/1998 | 2.759 | 吨/公顷 | 2026-9 |
| 1996/1997 | 1.724 | 吨/公顷 | 2026-9 |
| 1995/1996 | 3.25 | 吨/公顷 | 2026-9 |
| 1994/1995 | 2.938 | 吨/公顷 | 2026-9 |
| 1993/1994 | 2.624 | 吨/公顷 | 2026-9 |
| 1992/1993 | 3.725 | 吨/公顷 | 2026-9 |
| 1991/1992 | 3.903 | 吨/公顷 | 2026-9 |
| 1990/1991 | 3.736 | 吨/公顷 | 2026-9 |
| 1989/1990 | 4.356 | 吨/公顷 | 2026-9 |
| 1988/1989 | 3.806 | 吨/公顷 | 2026-9 |
| 1987/1988 | 3.698 | 吨/公顷 | 2026-9 |
| 1986/1987 | 3.598 | 吨/公顷 | 2026-9 |
| 1985/1986 | 3.077 | 吨/公顷 | 2026-9 |
| 1984/1985 | 4.06 | 吨/公顷 | 2026-9 |
| 1983/1984 | 3.242 | 吨/公顷 | 2026-9 |
| 1982/1983 | 4.08 | 吨/公顷 | 2026-9 |
| 1981/1982 | 3.681 | 吨/公顷 | 2026-9 |
| 1980/1981 | 3.228 | 吨/公顷 | 2026-9 |
| 1979/1980 | 3.254 | 吨/公顷 | 2026-9 |
| 1978/1979 | 3.146 | 吨/公顷 | 2026-9 |
| 1977/1978 | 2.8 | 吨/公顷 | 2026-9 |
| 1976/1977 | 3.399 | 吨/公顷 | 2026-9 |
| 1975/1976 | 2.96 | 吨/公顷 | 2026-9 |
| 1974/1975 | 3.43 | 吨/公顷 | 2026-9 |
| 1973/1974 | 2.987 | 吨/公顷 | 2026-9 |
| 1972/1973 | 3.198 | 吨/公顷 | 2026-9 |
| 1971/1972 | 2.887 | 吨/公顷 | 2026-9 |
| 1970/1971 | 2.896 | 吨/公顷 | 2026-9 |
| 1969/1970 | 2.197 | 吨/公顷 | 2026-9 |
| 1968/1969 | 2.008 | 吨/公顷 | 2026-9 |
| 1967/1968 | 2.545 | 吨/公顷 | 2026-9 |
| 1966/1967 | 2.558 | 吨/公顷 | 2026-9 |
| 1965/1966 | 2.355 | 吨/公顷 | 2026-9 |
| 1964/1965 | 2.134 | 吨/公顷 | 2026-9 |
| 1963/1964 | 1.802 | 吨/公顷 | 2026-9 |
| 1962/1963 | 1.977 | 吨/公顷 | 2026-9 |
| 1961/1962 | 2.007 | 吨/公顷 | 2026-9 |
| 1960/1961 | 2.101 | 吨/公顷 | 2026-9 |