| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 3 | 吨/公顷 | 2026-9 |
| 1997/1998 | 2.955 | 吨/公顷 | 2026-9 |
| 1996/1997 | 2 | 吨/公顷 | 2026-9 |
| 1995/1996 | 3.026 | 吨/公顷 | 2026-9 |
| 1994/1995 | 2.844 | 吨/公顷 | 2026-9 |
| 1993/1994 | 2.849 | 吨/公顷 | 2026-9 |
| 1992/1993 | 3.108 | 吨/公顷 | 2026-9 |
| 1991/1992 | 3.75 | 吨/公顷 | 2026-9 |
| 1990/1991 | 4.381 | 吨/公顷 | 2026-9 |
| 1989/1990 | 4.747 | 吨/公顷 | 2026-9 |
| 1988/1989 | 4.013 | 吨/公顷 | 2026-9 |
| 1987/1988 | 3.824 | 吨/公顷 | 2026-9 |
| 1986/1987 | 3.839 | 吨/公顷 | 2026-9 |
| 1985/1986 | 2.875 | 吨/公顷 | 2026-9 |
| 1984/1985 | 4.295 | 吨/公顷 | 2026-9 |
| 1983/1984 | 3.192 | 吨/公顷 | 2026-9 |
| 1982/1983 | 4.639 | 吨/公顷 | 2026-9 |
| 1981/1982 | 4.305 | 吨/公顷 | 2026-9 |
| 1980/1981 | 3.974 | 吨/公顷 | 2026-9 |
| 1979/1980 | 3.502 | 吨/公顷 | 2026-9 |
| 1978/1979 | 3.707 | 吨/公顷 | 2026-9 |
| 1977/1978 | 3.719 | 吨/公顷 | 2026-9 |
| 1976/1977 | 3.825 | 吨/公顷 | 2026-9 |
| 1975/1976 | 3.285 | 吨/公顷 | 2026-9 |
| 1974/1975 | 3.356 | 吨/公顷 | 2026-9 |
| 1973/1974 | 3.488 | 吨/公顷 | 2026-9 |
| 1972/1973 | 3.727 | 吨/公顷 | 2026-9 |
| 1971/1972 | 3.055 | 吨/公顷 | 2026-9 |
| 1970/1971 | 2.99 | 吨/公顷 | 2026-9 |
| 1969/1970 | 2.47 | 吨/公顷 | 2026-9 |
| 1968/1969 | 2.405 | 吨/公顷 | 2026-9 |
| 1967/1968 | 3.057 | 吨/公顷 | 2026-9 |
| 1966/1967 | 2.795 | 吨/公顷 | 2026-9 |
| 1965/1966 | 2.548 | 吨/公顷 | 2026-9 |
| 1964/1965 | 1.773 | 吨/公顷 | 2026-9 |
| 1963/1964 | 1.592 | 吨/公顷 | 2026-9 |
| 1962/1963 | 1.671 | 吨/公顷 | 2026-9 |
| 1961/1962 | 1.544 | 吨/公顷 | 2026-9 |
| 1960/1961 | 1.901 | 吨/公顷 | 2026-9 |