| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1990/1991 | 565 | 千吨 | 2026-9 |
| 1989/1990 | 469 | 千吨 | 2026-9 |
| 1988/1989 | 386 | 千吨 | 2026-9 |
| 1987/1988 | 556 | 千吨 | 2026-9 |
| 1986/1987 | 688 | 千吨 | 2026-9 |
| 1985/1986 | 754 | 千吨 | 2026-9 |
| 1984/1985 | 748 | 千吨 | 2026-9 |
| 1983/1984 | 603 | 千吨 | 2026-9 |
| 1982/1983 | 574 | 千吨 | 2026-9 |
| 1981/1982 | 345 | 千吨 | 2026-9 |
| 1980/1981 | 184 | 千吨 | 2026-9 |
| 1979/1980 | 200 | 千吨 | 2026-9 |
| 1978/1979 | 191 | 千吨 | 2026-9 |
| 1977/1978 | 181 | 千吨 | 2026-9 |
| 1976/1977 | 132 | 千吨 | 2026-9 |
| 1975/1976 | 112 | 千吨 | 2026-9 |
| 1974/1975 | 73 | 千吨 | 2026-9 |
| 1973/1974 | 50 | 千吨 | 2026-9 |
| 1972/1973 | 17 | 千吨 | 2026-9 |
| 1971/1972 | 33 | 千吨 | 2026-9 |
| 1970/1971 | 43 | 千吨 | 2026-9 |
| 1969/1970 | 40 | 千吨 | 2026-9 |
| 1968/1969 | 18 | 千吨 | 2026-9 |
| 1967/1968 | 0 | 千吨 | 2026-9 |