| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1990/1991 | 19.564 | 千吨 | 2026-9 |
| 1989/1990 | 8.537 | 千吨 | 2026-9 |
| 1988/1989 | 4.624 | 千吨 | 2026-9 |
| 1987/1988 | 6.047 | 千吨 | 2026-9 |
| 1986/1987 | 5.691 | 千吨 | 2026-9 |
| 1985/1986 | 5.336 | 千吨 | 2026-9 |
| 1984/1985 | 4.98 | 千吨 | 2026-9 |
| 1983/1984 | 6.758 | 千吨 | 2026-9 |
| 1982/1983 | 11.382 | 千吨 | 2026-9 |
| 1981/1982 | 30.235 | 千吨 | 2026-9 |
| 1980/1981 | 22.053 | 千吨 | 2026-9 |
| 1979/1980 | 13.161 | 千吨 | 2026-9 |
| 1978/1979 | 0.711 | 千吨 | 2026-9 |
| 1977/1978 | 1.423 | 千吨 | 2026-9 |
| 1976/1977 | 0.711 | 千吨 | 2026-9 |
| 1975/1976 | 1.067 | 千吨 | 2026-9 |
| 1974/1975 | 2.134 | 千吨 | 2026-9 |
| 1973/1974 | 2.134 | 千吨 | 2026-9 |
| 1972/1973 | 1.779 | 千吨 | 2026-9 |
| 1971/1972 | 1.423 | 千吨 | 2026-9 |
| 1970/1971 | 2.49 | 千吨 | 2026-9 |
| 1969/1970 | 2.134 | 千吨 | 2026-9 |
| 1968/1969 | 1.779 | 千吨 | 2026-9 |
| 1967/1968 | 2.134 | 千吨 | 2026-9 |
| 1966/1967 | 1.423 | 千吨 | 2026-9 |
| 1965/1966 | 2.134 | 千吨 | 2026-9 |
| 1964/1965 | 3.201 | 千吨 | 2026-9 |