| 年度 | 数值 | 单位 | 发布日期 |
|---|---|---|---|
| 1998 | 6 | 千吨 | 2026-9 |
| 1997 | 55 | 千吨 | 2026-9 |
| 1996 | 35 | 千吨 | 2026-9 |
| 1995 | 37 | 千吨 | 2026-9 |
| 1994 | 50 | 千吨 | 2026-9 |
| 1993 | 55 | 千吨 | 2026-9 |
| 1992 | 33 | 千吨 | 2026-9 |
| 1991 | 26 | 千吨 | 2026-9 |
| 1990 | 0 | 千吨 | 2026-9 |
| 1989 | 180 | 千吨 | 2026-9 |
| 1988 | 140 | 千吨 | 2026-9 |
| 1987 | 150 | 千吨 | 2026-9 |
| 1986 | 135 | 千吨 | 2026-9 |
| 1985 | 125 | 千吨 | 2026-9 |
| 1984 | 75 | 千吨 | 2026-9 |
| 1983 | 85 | 千吨 | 2026-9 |
| 1982 | 50 | 千吨 | 2026-9 |
| 1981 | 90 | 千吨 | 2026-9 |
| 1980 | 60 | 千吨 | 2026-9 |
| 1979 | 63 | 千吨 | 2026-9 |
| 1978 | 31 | 千吨 | 2026-9 |
| 1977 | 63 | 千吨 | 2026-9 |
| 1976 | 65 | 千吨 | 2026-9 |
| 1975 | 82 | 千吨 | 2026-9 |
| 1974 | 0 | 千吨 | 2026-9 |
| 1973 | 0 | 千吨 | 2026-9 |
| 1972 | 0 | 千吨 | 2026-9 |
| 1971 | 0 | 千吨 | 2026-9 |
| 1970 | 0 | 千吨 | 2026-9 |
| 1969 | 0 | 千吨 | 2026-9 |