| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 2.046 | 吨/公顷 | 2026-9 |
| 1997/1998 | 2.174 | 吨/公顷 | 2026-9 |
| 1996/1997 | 1.92 | 吨/公顷 | 2026-9 |
| 1995/1996 | 2.25 | 吨/公顷 | 2026-9 |
| 1994/1995 | 1.88 | 吨/公顷 | 2026-9 |
| 1993/1994 | 1.875 | 吨/公顷 | 2026-9 |
| 1992/1993 | 1.667 | 吨/公顷 | 2026-9 |
| 1991/1992 | 1.811 | 吨/公顷 | 2026-9 |
| 1990/1991 | 1.943 | 吨/公顷 | 2026-9 |
| 1989/1990 | 1.95 | 吨/公顷 | 2026-9 |
| 1988/1989 | 1.5 | 吨/公顷 | 2026-9 |
| 1987/1988 | 1.191 | 吨/公顷 | 2026-9 |
| 1986/1987 | 1.5 | 吨/公顷 | 2026-9 |
| 1985/1986 | 1.25 | 吨/公顷 | 2026-9 |
| 1984/1985 | 1.429 | 吨/公顷 | 2026-9 |
| 1983/1984 | 0.952 | 吨/公顷 | 2026-9 |
| 1982/1983 | 1 | 吨/公顷 | 2026-9 |
| 1981/1982 | 1.143 | 吨/公顷 | 2026-9 |
| 1980/1981 | 1.143 | 吨/公顷 | 2026-9 |
| 1979/1980 | 1.25 | 吨/公顷 | 2026-9 |
| 1978/1979 | 1.25 | 吨/公顷 | 2026-9 |
| 1977/1978 | 1.25 | 吨/公顷 | 2026-9 |
| 1976/1977 | 1.225 | 吨/公顷 | 2026-9 |
| 1975/1976 | 1.268 | 吨/公顷 | 2026-9 |
| 1974/1975 | 1.227 | 吨/公顷 | 2026-9 |
| 1973/1974 | 1.25 | 吨/公顷 | 2026-9 |
| 1972/1973 | 1.381 | 吨/公顷 | 2026-9 |
| 1971/1972 | 1.354 | 吨/公顷 | 2026-9 |
| 1970/1971 | 0.956 | 吨/公顷 | 2026-9 |
| 1969/1970 | 1.119 | 吨/公顷 | 2026-9 |
| 1968/1969 | 1.091 | 吨/公顷 | 2026-9 |
| 1967/1968 | 1.145 | 吨/公顷 | 2026-9 |
| 1966/1967 | 1.099 | 吨/公顷 | 2026-9 |
| 1965/1966 | 1.226 | 吨/公顷 | 2026-9 |
| 1964/1965 | 1.011 | 吨/公顷 | 2026-9 |
| 1963/1964 | 0.975 | 吨/公顷 | 2026-9 |
| 1962/1963 | 0.974 | 吨/公顷 | 2026-9 |
| 1961/1962 | 1.156 | 吨/公顷 | 2026-9 |
| 1960/1961 | 1.051 | 吨/公顷 | 2026-9 |