| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1996 | 278 | 千吨 | 2026-9 |
| 1995 | 307 | 千吨 | 2026-9 |
| 1994 | 399 | 千吨 | 2026-9 |
| 1993 | 289 | 千吨 | 2026-9 |
| 1992 | 252 | 千吨 | 2026-9 |
| 1991 | 241 | 千吨 | 2026-9 |
| 1990 | 183 | 千吨 | 2026-9 |
| 1989 | 211 | 千吨 | 2026-9 |
| 1988 | 186 | 千吨 | 2026-9 |
| 1987 | 156 | 千吨 | 2026-9 |
| 1986 | 208 | 千吨 | 2026-9 |
| 1985 | 82 | 千吨 | 2026-9 |
| 1984 | 92 | 千吨 | 2026-9 |
| 1983 | 40 | 千吨 | 2026-9 |
| 1982 | 17 | 千吨 | 2026-9 |
| 1981 | 11 | 千吨 | 2026-9 |
| 1980 | 8 | 千吨 | 2026-9 |
| 1979 | 6 | 千吨 | 2026-9 |
| 1978 | 2 | 千吨 | 2026-9 |
| 1977 | 3 | 千吨 | 2026-9 |
| 1976 | 51 | 千吨 | 2026-9 |
| 1975 | 173 | 千吨 | 2026-9 |
| 1974 | 356 | 千吨 | 2026-9 |
| 1973 | 47 | 千吨 | 2026-9 |
| 1972 | 63 | 千吨 | 2026-9 |
| 1971 | 176 | 千吨 | 2026-9 |
| 1970 | 38 | 千吨 | 2026-9 |
| 1969 | 2 | 千吨 | 2026-9 |
| 1968 | 29 | 千吨 | 2026-9 |
| 1967 | 12 | 千吨 | 2026-9 |
| 1966 | 0 | 千吨 | 2026-9 |
| 1965 | 0 | 千吨 | 2026-9 |
| 1964 | 639 | 千吨 | 2026-9 |