| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1996 | 10 | 千吨 | 2026-9 |
| 1995 | 0 | 千吨 | 2026-9 |
| 1994 | 20 | 千吨 | 2026-9 |
| 1993 | 9 | 千吨 | 2026-9 |
| 1992 | 13 | 千吨 | 2026-9 |
| 1991 | 177 | 千吨 | 2026-9 |
| 1990 | 205 | 千吨 | 2026-9 |
| 1989 | 195 | 千吨 | 2026-9 |
| 1988 | 149 | 千吨 | 2026-9 |
| 1987 | 650 | 千吨 | 2026-9 |
| 1986 | 869 | 千吨 | 2026-9 |
| 1985 | 483 | 千吨 | 2026-9 |
| 1984 | 472 | 千吨 | 2026-9 |
| 1983 | 552 | 千吨 | 2026-9 |
| 1982 | 388 | 千吨 | 2026-9 |
| 1981 | 245 | 千吨 | 2026-9 |
| 1980 | 170 | 千吨 | 2026-9 |
| 1979 | 280 | 千吨 | 2026-9 |
| 1978 | 543 | 千吨 | 2026-9 |
| 1977 | 599 | 千吨 | 2026-9 |
| 1976 | 582 | 千吨 | 2026-9 |
| 1975 | 346 | 千吨 | 2026-9 |
| 1974 | 140 | 千吨 | 2026-9 |
| 1973 | 58 | 千吨 | 2026-9 |
| 1972 | 31 | 千吨 | 2026-9 |
| 1971 | 20 | 千吨 | 2026-9 |
| 1970 | 58 | 千吨 | 2026-9 |
| 1969 | 121 | 千吨 | 2026-9 |
| 1968 | 33 | 千吨 | 2026-9 |
| 1967 | 0 | 千吨 | 2026-9 |
| 1966 | 0 | 千吨 | 2026-9 |
| 1965 | 0 | 千吨 | 2026-9 |
| 1964 | 0 | 千吨 | 2026-9 |