| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1990/1991 | 3.241 | 千吨 | 2026-9 |
| 1989/1990 | 2.431 | 千吨 | 2026-9 |
| 1988/1989 | 2.431 | 千吨 | 2026-9 |
| 1987/1988 | 3.241 | 千吨 | 2026-9 |
| 1986/1987 | 3.241 | 千吨 | 2026-9 |
| 1985/1986 | 3.241 | 千吨 | 2026-9 |
| 1984/1985 | 4.052 | 千吨 | 2026-9 |
| 1983/1984 | 3.241 | 千吨 | 2026-9 |
| 1982/1983 | 4.862 | 千吨 | 2026-9 |
| 1981/1982 | 2.431 | 千吨 | 2026-9 |
| 1980/1981 | 2.431 | 千吨 | 2026-9 |
| 1979/1980 | 4.052 | 千吨 | 2026-9 |
| 1978/1979 | 3.241 | 千吨 | 2026-9 |
| 1977/1978 | 2.431 | 千吨 | 2026-9 |
| 1976/1977 | 0 | 千吨 | 2026-9 |
| 1975/1976 | 6.482 | 千吨 | 2026-9 |
| 1974/1975 | 8.103 | 千吨 | 2026-9 |
| 1973/1974 | 8.103 | 千吨 | 2026-9 |
| 1972/1973 | 33.222 | 千吨 | 2026-9 |
| 1971/1972 | 18.637 | 千吨 | 2026-9 |
| 1970/1971 | 14.585 | 千吨 | 2026-9 |
| 1969/1970 | 8.913 | 千吨 | 2026-9 |