| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 2.081 | 吨/公顷 | 2026-9 |
| 1997/1998 | 2 | 吨/公顷 | 2026-9 |
| 1996/1997 | 1.429 | 吨/公顷 | 2026-9 |
| 1995/1996 | 2.125 | 吨/公顷 | 2026-9 |
| 1994/1995 | 2.222 | 吨/公顷 | 2026-9 |
| 1993/1994 | 1.571 | 吨/公顷 | 2026-9 |
| 1992/1993 | 2 | 吨/公顷 | 2026-9 |
| 1991/1992 | 2.376 | 吨/公顷 | 2026-9 |
| 1990/1991 | 2.457 | 吨/公顷 | 2026-9 |
| 1989/1990 | 2.062 | 吨/公顷 | 2026-9 |
| 1988/1989 | 2.526 | 吨/公顷 | 2026-9 |
| 1987/1988 | 1.979 | 吨/公顷 | 2026-9 |
| 1986/1987 | 1.933 | 吨/公顷 | 2026-9 |
| 1985/1986 | 1.953 | 吨/公顷 | 2026-9 |
| 1984/1985 | 2.56 | 吨/公顷 | 2026-9 |
| 1983/1984 | 1.889 | 吨/公顷 | 2026-9 |
| 1982/1983 | 1.554 | 吨/公顷 | 2026-9 |
| 1981/1982 | 1.568 | 吨/公顷 | 2026-9 |
| 1980/1981 | 1.932 | 吨/公顷 | 2026-9 |
| 1979/1980 | 1.333 | 吨/公顷 | 2026-9 |
| 1978/1979 | 1.756 | 吨/公顷 | 2026-9 |
| 1977/1978 | 1.56 | 吨/公顷 | 2026-9 |
| 1976/1977 | 1.688 | 吨/公顷 | 2026-9 |
| 1975/1976 | 1.414 | 吨/公顷 | 2026-9 |
| 1974/1975 | 1.651 | 吨/公顷 | 2026-9 |
| 1973/1974 | 1.636 | 吨/公顷 | 2026-9 |
| 1972/1973 | 1.437 | 吨/公顷 | 2026-9 |
| 1971/1972 | 1.433 | 吨/公顷 | 2026-9 |
| 1970/1971 | 1.04 | 吨/公顷 | 2026-9 |
| 1969/1970 | 1.284 | 吨/公顷 | 2026-9 |
| 1968/1969 | 1.253 | 吨/公顷 | 2026-9 |
| 1967/1968 | 1.103 | 吨/公顷 | 2026-9 |
| 1966/1967 | 1.1 | 吨/公顷 | 2026-9 |
| 1965/1966 | 1.171 | 吨/公顷 | 2026-9 |
| 1964/1965 | 1.073 | 吨/公顷 | 2026-9 |
| 1963/1964 | 1.034 | 吨/公顷 | 2026-9 |
| 1962/1963 | 1.004 | 吨/公顷 | 2026-9 |
| 1961/1962 | 1.108 | 吨/公顷 | 2026-9 |
| 1960/1961 | 1.176 | 吨/公顷 | 2026-9 |