| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1990/1991 | 2.434 | 吨/公顷 | 2026-9 |
| 1989/1990 | 2.824 | 吨/公顷 | 2026-9 |
| 1988/1989 | 2.884 | 吨/公顷 | 2026-9 |
| 1987/1988 | 2.432 | 吨/公顷 | 2026-9 |
| 1986/1987 | 2.5 | 吨/公顷 | 2026-9 |
| 1985/1986 | 2.628 | 吨/公顷 | 2026-9 |
| 1984/1985 | 2.276 | 吨/公顷 | 2026-9 |
| 1983/1984 | 2.097 | 吨/公顷 | 2026-9 |
| 1982/1983 | 2.546 | 吨/公顷 | 2026-9 |
| 1981/1982 | 2.28 | 吨/公顷 | 2026-9 |
| 1980/1981 | 2.48 | 吨/公顷 | 2026-9 |
| 1979/1980 | 1.779 | 吨/公顷 | 2026-9 |
| 1978/1979 | 2.565 | 吨/公顷 | 2026-9 |
| 1977/1978 | 2.464 | 吨/公顷 | 2026-9 |
| 1976/1977 | 2.462 | 吨/公顷 | 2026-9 |
| 1975/1976 | 2.75 | 吨/公顷 | 2026-9 |
| 1974/1975 | 2.423 | 吨/公顷 | 2026-9 |
| 1973/1974 | 2.016 | 吨/公顷 | 2026-9 |
| 1972/1973 | 2.108 | 吨/公顷 | 2026-9 |
| 1971/1972 | 1.894 | 吨/公顷 | 2026-9 |
| 1970/1971 | 1.85 | 吨/公顷 | 2026-9 |
| 1969/1970 | 1.504 | 吨/公顷 | 2026-9 |
| 1968/1969 | 2.168 | 吨/公顷 | 2026-9 |
| 1967/1968 | 2.24 | 吨/公顷 | 2026-9 |
| 1966/1967 | 1.76 | 吨/公顷 | 2026-9 |
| 1965/1966 | 1.843 | 吨/公顷 | 2026-9 |
| 1964/1965 | 1.492 | 吨/公顷 | 2026-9 |