| 年度 | 数值 | 单位 | 发布日期 |
|---|---|---|---|
| 1980/1981 | 2.258 | 千吨 | 2026-9 |
| 1979/1980 | 2.258 | 千吨 | 2026-9 |
| 1978/1979 | 2.258 | 千吨 | 2026-9 |
| 1977/1978 | 1.806 | 千吨 | 2026-9 |
| 1976/1977 | 2.709 | 千吨 | 2026-9 |
| 1975/1976 | 14.9 | 千吨 | 2026-9 |
| 1974/1975 | 1.355 | 千吨 | 2026-9 |
| 1973/1974 | 10.385 | 千吨 | 2026-9 |
| 1972/1973 | 38.829 | 千吨 | 2026-9 |
| 1971/1972 | 38.378 | 千吨 | 2026-9 |
| 1970/1971 | 31.605 | 千吨 | 2026-9 |
| 1969/1970 | 33.863 | 千吨 | 2026-9 |
| 1968/1969 | 52.826 | 千吨 | 2026-9 |
| 1967/1968 | 55.535 | 千吨 | 2026-9 |
| 1966/1967 | 46.505 | 千吨 | 2026-9 |
| 1965/1966 | 42.441 | 千吨 | 2026-9 |
| 1964/1965 | 49.665 | 千吨 | 2026-9 |