| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1990/1991 | 2.795 | 吨/公顷 | 2026-9 |
| 1989/1990 | 2.762 | 吨/公顷 | 2026-9 |
| 1988/1989 | 2.649 | 吨/公顷 | 2026-9 |
| 1987/1988 | 3.574 | 吨/公顷 | 2026-9 |
| 1986/1987 | 2.76 | 吨/公顷 | 2026-9 |
| 1985/1986 | 2.907 | 吨/公顷 | 2026-9 |
| 1984/1985 | 3.033 | 吨/公顷 | 2026-9 |
| 1983/1984 | 1.957 | 吨/公顷 | 2026-9 |
| 1982/1983 | 2.412 | 吨/公顷 | 2026-9 |
| 1981/1982 | 2.111 | 吨/公顷 | 2026-9 |
| 1980/1981 | 2.758 | 吨/公顷 | 2026-9 |
| 1979/1980 | 2.287 | 吨/公顷 | 2026-9 |
| 1978/1979 | 2.245 | 吨/公顷 | 2026-9 |
| 1977/1978 | 1.411 | 吨/公顷 | 2026-9 |
| 1976/1977 | 1.901 | 吨/公顷 | 2026-9 |
| 1975/1976 | 1.816 | 吨/公顷 | 2026-9 |
| 1974/1975 | 2.066 | 吨/公顷 | 2026-9 |
| 1973/1974 | 1.93 | 吨/公顷 | 2026-9 |
| 1972/1973 | 2.264 | 吨/公顷 | 2026-9 |
| 1971/1972 | 2.059 | 吨/公顷 | 2026-9 |
| 1970/1971 | 1.871 | 吨/公顷 | 2026-9 |
| 1969/1970 | 1.788 | 吨/公顷 | 2026-9 |
| 1968/1969 | 1.719 | 吨/公顷 | 2026-9 |
| 1967/1968 | 2.025 | 吨/公顷 | 2026-9 |
| 1966/1967 | 1.771 | 吨/公顷 | 2026-9 |
| 1965/1966 | 1.954 | 吨/公顷 | 2026-9 |
| 1964/1965 | 1.992 | 吨/公顷 | 2026-9 |