| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 2.603 | 吨/公顷 | 2026-9 |
| 1997/1998 | 2.604 | 吨/公顷 | 2026-9 |
| 1996/1997 | 2.53 | 吨/公顷 | 2026-9 |
| 1995/1996 | 2.513 | 吨/公顷 | 2026-9 |
| 1994/1995 | 2.011 | 吨/公顷 | 2026-9 |
| 1993/1994 | 2.336 | 吨/公顷 | 2026-9 |
| 1992/1993 | 1.843 | 吨/公顷 | 2026-9 |
| 1991/1992 | 2.73 | 吨/公顷 | 2026-9 |
| 1990/1991 | 2.837 | 吨/公顷 | 2026-9 |
| 1989/1990 | 2.722 | 吨/公顷 | 2026-9 |
| 1988/1989 | 2.614 | 吨/公顷 | 2026-9 |
| 1987/1988 | 2.836 | 吨/公顷 | 2026-9 |
| 1986/1987 | 2.691 | 吨/公顷 | 2026-9 |
| 1985/1986 | 2.698 | 吨/公顷 | 2026-9 |
| 1984/1985 | 2.788 | 吨/公顷 | 2026-9 |
| 1983/1984 | 2.281 | 吨/公顷 | 2026-9 |
| 1982/1983 | 2.402 | 吨/公顷 | 2026-9 |
| 1981/1982 | 2.363 | 吨/公顷 | 2026-9 |
| 1980/1981 | 2.252 | 吨/公顷 | 2026-9 |
| 1979/1980 | 1.998 | 吨/公顷 | 2026-9 |
| 1978/1979 | 2.419 | 吨/公顷 | 2026-9 |
| 1977/1978 | 2.326 | 吨/公顷 | 2026-9 |
| 1976/1977 | 2.417 | 吨/公顷 | 2026-9 |
| 1975/1976 | 2.262 | 吨/公顷 | 2026-9 |
| 1974/1975 | 2.745 | 吨/公顷 | 2026-9 |
| 1973/1974 | 2.533 | 吨/公顷 | 2026-9 |
| 1972/1973 | 2.364 | 吨/公顷 | 2026-9 |
| 1971/1972 | 2.402 | 吨/公顷 | 2026-9 |
| 1970/1971 | 2.097 | 吨/公顷 | 2026-9 |
| 1969/1970 | 2.241 | 吨/公顷 | 2026-9 |
| 1968/1969 | 2.074 | 吨/公顷 | 2026-9 |
| 1967/1968 | 1.973 | 吨/公顷 | 2026-9 |
| 1966/1967 | 1.878 | 吨/公顷 | 2026-9 |
| 1965/1966 | 1.884 | 吨/公顷 | 2026-9 |
| 1964/1965 | 1.421 | 吨/公顷 | 2026-9 |
| 1963/1964 | 1.683 | 吨/公顷 | 2026-9 |
| 1962/1963 | 1.73 | 吨/公顷 | 2026-9 |
| 1961/1962 | 1.835 | 吨/公顷 | 2026-9 |
| 1960/1961 | 1.69 | 吨/公顷 | 2026-9 |