| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 3.625 | 吨/公顷 | 2026-9 |
| 1997/1998 | 3.207 | 吨/公顷 | 2026-9 |
| 1996/1997 | 3.459 | 吨/公顷 | 2026-9 |
| 1995/1996 | 3.601 | 吨/公顷 | 2026-9 |
| 1994/1995 | 3.182 | 吨/公顷 | 2026-9 |
| 1993/1994 | 3.297 | 吨/公顷 | 2026-9 |
| 1992/1993 | 3.064 | 吨/公顷 | 2026-9 |
| 1991/1992 | 3.804 | 吨/公顷 | 2026-9 |
| 1990/1991 | 3.957 | 吨/公顷 | 2026-9 |
| 1989/1990 | 3.855 | 吨/公顷 | 2026-9 |
| 1988/1989 | 3.48 | 吨/公顷 | 2026-9 |
| 1987/1988 | 3.725 | 吨/公顷 | 2026-9 |
| 1986/1987 | 3.705 | 吨/公顷 | 2026-9 |
| 1985/1986 | 3.428 | 吨/公顷 | 2026-9 |
| 1984/1985 | 3.521 | 吨/公顷 | 2026-9 |
| 1983/1984 | 3.36 | 吨/公顷 | 2026-9 |
| 1982/1983 | 3.074 | 吨/公顷 | 2026-9 |
| 1981/1982 | 2.964 | 吨/公顷 | 2026-9 |
| 1980/1981 | 2.595 | 吨/公顷 | 2026-9 |
| 1979/1980 | 2.703 | 吨/公顷 | 2026-9 |
| 1978/1979 | 3.255 | 吨/公顷 | 2026-9 |
| 1977/1978 | 2.894 | 吨/公顷 | 2026-9 |
| 1976/1977 | 3.136 | 吨/公顷 | 2026-9 |
| 1975/1976 | 2.827 | 吨/公顷 | 2026-9 |
| 1974/1975 | 3.17 | 吨/公顷 | 2026-9 |
| 1973/1974 | 2.96 | 吨/公顷 | 2026-9 |
| 1972/1973 | 2.513 | 吨/公顷 | 2026-9 |
| 1971/1972 | 2.649 | 吨/公顷 | 2026-9 |
| 1970/1971 | 2.321 | 吨/公顷 | 2026-9 |
| 1969/1970 | 2.397 | 吨/公顷 | 2026-9 |
| 1968/1969 | 2.477 | 吨/公顷 | 2026-9 |
| 1967/1968 | 2.239 | 吨/公顷 | 2026-9 |
| 1966/1967 | 2.146 | 吨/公顷 | 2026-9 |
| 1965/1966 | 2.064 | 吨/公顷 | 2026-9 |
| 1964/1965 | 1.871 | 吨/公顷 | 2026-9 |
| 1963/1964 | 1.99 | 吨/公顷 | 2026-9 |
| 1962/1963 | 1.938 | 吨/公顷 | 2026-9 |
| 1961/1962 | 1.993 | 吨/公顷 | 2026-9 |
| 1960/1961 | 1.692 | 吨/公顷 | 2026-9 |