| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1996 | 28 | 千吨 | 2026-9 |
| 1995 | 24 | 千吨 | 2026-9 |
| 1994 | 22 | 千吨 | 2026-9 |
| 1993 | 20 | 千吨 | 2026-9 |
| 1992 | 24 | 千吨 | 2026-9 |
| 1991 | 5 | 千吨 | 2026-9 |
| 1990 | 46 | 千吨 | 2026-9 |
| 1989 | 37 | 千吨 | 2026-9 |
| 1988 | 41 | 千吨 | 2026-9 |
| 1987 | 149 | 千吨 | 2026-9 |
| 1986 | 209 | 千吨 | 2026-9 |
| 1985 | 121 | 千吨 | 2026-9 |
| 1984 | 149 | 千吨 | 2026-9 |
| 1983 | 189 | 千吨 | 2026-9 |
| 1982 | 90 | 千吨 | 2026-9 |
| 1981 | 43 | 千吨 | 2026-9 |
| 1980 | 60 | 千吨 | 2026-9 |
| 1979 | 57 | 千吨 | 2026-9 |
| 1978 | 87 | 千吨 | 2026-9 |
| 1977 | 35 | 千吨 | 2026-9 |
| 1976 | 106 | 千吨 | 2026-9 |
| 1975 | 85 | 千吨 | 2026-9 |
| 1974 | 60 | 千吨 | 2026-9 |
| 1973 | 75 | 千吨 | 2026-9 |
| 1972 | 143 | 千吨 | 2026-9 |
| 1971 | 64 | 千吨 | 2026-9 |
| 1970 | 69 | 千吨 | 2026-9 |
| 1969 | 150 | 千吨 | 2026-9 |
| 1968 | 173 | 千吨 | 2026-9 |
| 1967 | 109 | 千吨 | 2026-9 |
| 1966 | 87 | 千吨 | 2026-9 |
| 1965 | 67 | 千吨 | 2026-9 |
| 1964 | 39 | 千吨 | 2026-9 |