| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 4.434 | 吨/公顷 | 2026-9 |
| 1997/1998 | 4.548 | 吨/公顷 | 2026-9 |
| 1996/1997 | 4.303 | 吨/公顷 | 2026-9 |
| 1995/1996 | 4.338 | 吨/公顷 | 2026-9 |
| 1994/1995 | 3.99 | 吨/公顷 | 2026-9 |
| 1993/1994 | 3.782 | 吨/公顷 | 2026-9 |
| 1992/1993 | 3.243 | 吨/公顷 | 2026-9 |
| 1991/1992 | 3.761 | 吨/公顷 | 2026-9 |
| 1990/1991 | 3.436 | 吨/公顷 | 2026-9 |
| 1989/1990 | 3.398 | 吨/公顷 | 2026-9 |
| 1988/1989 | 3.057 | 吨/公顷 | 2026-9 |
| 1987/1988 | 3.149 | 吨/公顷 | 2026-9 |
| 1986/1987 | 3.247 | 吨/公顷 | 2026-9 |
| 1985/1986 | 3.36 | 吨/公顷 | 2026-9 |
| 1984/1985 | 3.378 | 吨/公顷 | 2026-9 |
| 1983/1984 | 2.845 | 吨/公顷 | 2026-9 |
| 1982/1983 | 2.91 | 吨/公顷 | 2026-9 |
| 1981/1982 | 2.616 | 吨/公顷 | 2026-9 |
| 1980/1981 | 2.825 | 吨/公顷 | 2026-9 |
| 1979/1980 | 2.67 | 吨/公顷 | 2026-9 |
| 1978/1979 | 2.876 | 吨/公顷 | 2026-9 |
| 1977/1978 | 2.681 | 吨/公顷 | 2026-9 |
| 1976/1977 | 2.485 | 吨/公顷 | 2026-9 |
| 1975/1976 | 2.566 | 吨/公顷 | 2026-9 |
| 1974/1975 | 2.816 | 吨/公顷 | 2026-9 |
| 1973/1974 | 2.621 | 吨/公顷 | 2026-9 |
| 1972/1973 | 2.683 | 吨/公顷 | 2026-9 |
| 1971/1972 | 2.634 | 吨/公顷 | 2026-9 |
| 1970/1971 | 2.258 | 吨/公顷 | 2026-9 |
| 1969/1970 | 2.344 | 吨/公顷 | 2026-9 |
| 1968/1969 | 2.49 | 吨/公顷 | 2026-9 |
| 1967/1968 | 2.413 | 吨/公顷 | 2026-9 |
| 1966/1967 | 1.987 | 吨/公顷 | 2026-9 |
| 1965/1966 | 2.028 | 吨/公顷 | 2026-9 |
| 1964/1965 | 2.261 | 吨/公顷 | 2026-9 |
| 1963/1964 | 2.055 | 吨/公顷 | 2026-9 |
| 1962/1963 | 2.025 | 吨/公顷 | 2026-9 |
| 1961/1962 | 1.726 | 吨/公顷 | 2026-9 |
| 1960/1961 | 2.114 | 吨/公顷 | 2026-9 |