| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1990/1991 | 0.81 | 千吨 | 2026-9 |
| 1989/1990 | 0.81 | 千吨 | 2026-9 |
| 1988/1989 | 2.431 | 千吨 | 2026-9 |
| 1987/1988 | 1.621 | 千吨 | 2026-9 |
| 1986/1987 | 0.81 | 千吨 | 2026-9 |
| 1985/1986 | 0.81 | 千吨 | 2026-9 |
| 1984/1985 | 2.431 | 千吨 | 2026-9 |
| 1983/1984 | 1.621 | 千吨 | 2026-9 |
| 1982/1983 | 2.431 | 千吨 | 2026-9 |
| 1981/1982 | 17.016 | 千吨 | 2026-9 |
| 1980/1981 | 15.396 | 千吨 | 2026-9 |
| 1979/1980 | 16.206 | 千吨 | 2026-9 |
| 1978/1979 | 29.981 | 千吨 | 2026-9 |
| 1977/1978 | 34.033 | 千吨 | 2026-9 |
| 1976/1977 | 37.274 | 千吨 | 2026-9 |
| 1975/1976 | 57.531 | 千吨 | 2026-9 |
| 1974/1975 | 45.377 | 千吨 | 2026-9 |
| 1973/1974 | 52.67 | 千吨 | 2026-9 |
| 1972/1973 | 76.168 | 千吨 | 2026-9 |
| 1971/1972 | 86.702 | 千吨 | 2026-9 |
| 1970/1971 | 72.927 | 千吨 | 2026-9 |
| 1969/1970 | 78.599 | 千吨 | 2026-9 |