| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 5.867 | 吨/公顷 | 2026-9 |
| 1997/1998 | 6.342 | 吨/公顷 | 2026-9 |
| 1996/1997 | 5.768 | 吨/公顷 | 2026-9 |
| 1995/1996 | 5.803 | 吨/公顷 | 2026-9 |
| 1994/1995 | 5.036 | 吨/公顷 | 2026-9 |
| 1993/1994 | 6.008 | 吨/公顷 | 2026-9 |
| 1992/1993 | 5.873 | 吨/公顷 | 2026-9 |
| 1991/1992 | 5.644 | 吨/公顷 | 2026-9 |
| 1990/1991 | 4.364 | 吨/公顷 | 2026-9 |
| 1989/1990 | 4.898 | 吨/公顷 | 2026-9 |
| 1988/1989 | 5.859 | 吨/公顷 | 2026-9 |
| 1987/1988 | 5.339 | 吨/公顷 | 2026-9 |
| 1986/1987 | 4.641 | 吨/公顷 | 2026-9 |
| 1985/1986 | 4.463 | 吨/公顷 | 2026-9 |
| 1984/1985 | 4.48 | 吨/公顷 | 2026-9 |
| 1983/1984 | 4.384 | 吨/公顷 | 2026-9 |
| 1982/1983 | 4.68 | 吨/公顷 | 2026-9 |
| 1981/1982 | 4.851 | 吨/公顷 | 2026-9 |
| 1980/1981 | 4.691 | 吨/公顷 | 2026-9 |
| 1979/1980 | 4.391 | 吨/公顷 | 2026-9 |
| 1978/1979 | 4.614 | 吨/公顷 | 2026-9 |
| 1977/1978 | 3.882 | 吨/公顷 | 2026-9 |
| 1976/1977 | 3.715 | 吨/公顷 | 2026-9 |
| 1975/1976 | 3.813 | 吨/公顷 | 2026-9 |
| 1974/1975 | 4.036 | 吨/公顷 | 2026-9 |
| 1973/1974 | 4.132 | 吨/公顷 | 2026-9 |
| 1972/1973 | 3.897 | 吨/公顷 | 2026-9 |
| 1971/1972 | 4.182 | 吨/公顷 | 2026-9 |
| 1970/1971 | 3.589 | 吨/公顷 | 2026-9 |
| 1969/1970 | 3.267 | 吨/公顷 | 2026-9 |
| 1968/1969 | 3.376 | 吨/公顷 | 2026-9 |
| 1967/1968 | 2.483 | 吨/公顷 | 2026-9 |
| 1966/1967 | 2.47 | 吨/公顷 | 2026-9 |
| 1965/1966 | 2.61 | 吨/公顷 | 2026-9 |
| 1964/1965 | 2.654 | 吨/公顷 | 2026-9 |
| 1963/1964 | 2.861 | 吨/公顷 | 2026-9 |
| 1962/1963 | 2.55 | 吨/公顷 | 2026-9 |
| 1961/1962 | 2.375 | 吨/公顷 | 2026-9 |
| 1960/1961 | 2.36 | 吨/公顷 | 2026-9 |