| 年度 | 数值 | 单位 | 发布时间 |
|---|
| 1998/1999 | 5.455 | 吨/公顷 | 2026-9 |
| 1997/1998 | 6.8 | 吨/公顷 | 2026-9 |
| 1996/1997 | 5.698 | 吨/公顷 | 2026-9 |
| 1995/1996 | 4.423 | 吨/公顷 | 2026-9 |
| 1994/1995 | 3.583 | 吨/公顷 | 2026-9 |
| 1993/1994 | 3.55 | 吨/公顷 | 2026-9 |
| 1992/1993 | 3.695 | 吨/公顷 | 2026-9 |
| 1991/1992 | 7.003 | 吨/公顷 | 2026-9 |
| 1990/1991 | 3.99 | 吨/公顷 | 2026-9 |
| 1989/1990 | 6.224 | 吨/公顷 | 2026-9 |
| 1988/1989 | 5.465 | 吨/公顷 | 2026-9 |
| 1987/1988 | 6.323 | 吨/公顷 | 2026-9 |
| 1986/1987 | 6.495 | 吨/公顷 | 2026-9 |
| 1985/1986 | 6.475 | 吨/公顷 | 2026-9 |
| 1984/1985 | 5.884 | 吨/公顷 | 2026-9 |
| 1983/1984 | 5.677 | 吨/公顷 | 2026-9 |
| 1982/1983 | 6.86 | 吨/公顷 | 2026-9 |
| 1981/1982 | 6.017 | 吨/公顷 | 2026-9 |
| 1980/1981 | 5.43 | 吨/公顷 | 2026-9 |
| 1979/1980 | 5.47 | 吨/公顷 | 2026-9 |
| 1978/1979 | 5.187 | 吨/公顷 | 2026-9 |
| 1977/1978 | 4.689 | 吨/公顷 | 2026-9 |
| 1976/1977 | 3.839 | 吨/公顷 | 2026-9 |
| 1975/1976 | 5.011 | 吨/公顷 | 2026-9 |
| 1974/1975 | 4.24 | 吨/公顷 | 2026-9 |
| 1973/1974 | 4.082 | 吨/公顷 | 2026-9 |
| 1972/1973 | 3.99 | 吨/公顷 | 2026-9 |
| 1971/1972 | 3.582 | 吨/公顷 | 2026-9 |
| 1970/1971 | 3.375 | 吨/公顷 | 2026-9 |
| 1969/1970 | 3.788 | 吨/公顷 | 2026-9 |
| 1968/1969 | 2.992 | 吨/公顷 | 2026-9 |
| 1967/1968 | 2.847 | 吨/公顷 | 2026-9 |
| 1966/1967 | 3.158 | 吨/公顷 | 2026-9 |
| 1965/1966 | 2.926 | 吨/公顷 | 2026-9 |
| 1964/1965 | 2.902 | 吨/公顷 | 2026-9 |
| 1963/1964 | 2.755 | 吨/公顷 | 2026-9 |
| 1962/1963 | 2.516 | 吨/公顷 | 2026-9 |
| 1961/1962 | 2.026 | 吨/公顷 | 2026-9 |
| 1960/1961 | 2.501 | 吨/公顷 | 2026-9 |