| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1996 | 35 | 千吨 | 2026-9 |
| 1995 | 26 | 千吨 | 2026-9 |
| 1994 | 20 | 千吨 | 2026-9 |
| 1993 | 18 | 千吨 | 2026-9 |
| 1992 | 36 | 千吨 | 2026-9 |
| 1991 | 9 | 千吨 | 2026-9 |
| 1990 | 11 | 千吨 | 2026-9 |
| 1989 | 0 | 千吨 | 2026-9 |
| 1988 | 43 | 千吨 | 2026-9 |
| 1987 | 39 | 千吨 | 2026-9 |
| 1986 | 59 | 千吨 | 2026-9 |
| 1985 | 41 | 千吨 | 2026-9 |
| 1984 | 60 | 千吨 | 2026-9 |
| 1983 | 87 | 千吨 | 2026-9 |
| 1982 | 68 | 千吨 | 2026-9 |
| 1981 | 52 | 千吨 | 2026-9 |
| 1980 | 49 | 千吨 | 2026-9 |
| 1979 | 89 | 千吨 | 2026-9 |
| 1978 | 131 | 千吨 | 2026-9 |
| 1977 | 361 | 千吨 | 2026-9 |
| 1976 | 446 | 千吨 | 2026-9 |
| 1975 | 217 | 千吨 | 2026-9 |
| 1974 | 202 | 千吨 | 2026-9 |
| 1973 | 134 | 千吨 | 2026-9 |
| 1972 | 61 | 千吨 | 2026-9 |
| 1971 | 113 | 千吨 | 2026-9 |
| 1970 | 208 | 千吨 | 2026-9 |
| 1969 | 220 | 千吨 | 2026-9 |
| 1968 | 147 | 千吨 | 2026-9 |
| 1967 | 73 | 千吨 | 2026-9 |
| 1966 | 68 | 千吨 | 2026-9 |
| 1965 | 63 | 千吨 | 2026-9 |
| 1964 | 61 | 千吨 | 2026-9 |