| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1989/1990 | 11.6 | 千吨 | 2026-9 |
| 1988/1989 | 0 | 千吨 | 2026-9 |
| 1987/1988 | 5.8 | 千吨 | 2026-9 |
| 1986/1987 | 7.25 | 千吨 | 2026-9 |
| 1985/1986 | 10.15 | 千吨 | 2026-9 |
| 1984/1985 | 8.7 | 千吨 | 2026-9 |
| 1983/1984 | 7.25 | 千吨 | 2026-9 |
| 1982/1983 | 7.25 | 千吨 | 2026-9 |
| 1981/1982 | 8.7 | 千吨 | 2026-9 |
| 1980/1981 | 5.8 | 千吨 | 2026-9 |
| 1979/1980 | 8.7 | 千吨 | 2026-9 |
| 1978/1979 | 7.25 | 千吨 | 2026-9 |
| 1977/1978 | 14.5 | 千吨 | 2026-9 |
| 1976/1977 | 14.5 | 千吨 | 2026-9 |
| 1975/1976 | 17.4 | 千吨 | 2026-9 |
| 1974/1975 | 50.75 | 千吨 | 2026-9 |
| 1973/1974 | 13.05 | 千吨 | 2026-9 |
| 1972/1973 | 20.3 | 千吨 | 2026-9 |
| 1971/1972 | 33.35 | 千吨 | 2026-9 |
| 1970/1971 | 62.35 | 千吨 | 2026-9 |
| 1969/1970 | 49.3 | 千吨 | 2026-9 |
| 1968/1969 | 49.3 | 千吨 | 2026-9 |
| 1967/1968 | 53.65 | 千吨 | 2026-9 |
| 1966/1967 | 44.95 | 千吨 | 2026-9 |
| 1965/1966 | 30.45 | 千吨 | 2026-9 |
| 1964/1965 | 29 | 千吨 | 2026-9 |