| 年度 | 数值 | 单位 | 发布日期 |
|---|---|---|---|
| 2002 | 6 | 千吨 | 2026-9 |
| 2001 | 6 | 千吨 | 2026-9 |
| 2000 | 3 | 千吨 | 2026-9 |
| 1999 | 4 | 千吨 | 2026-9 |
| 1998 | 2 | 千吨 | 2026-9 |
| 1997 | 2 | 千吨 | 2026-9 |
| 1996 | 0 | 千吨 | 2026-9 |
| 1995 | 4 | 千吨 | 2026-9 |
| 1994 | 5 | 千吨 | 2026-9 |
| 1993 | 25 | 千吨 | 2026-9 |
| 1992 | 15 | 千吨 | 2026-9 |
| 1991 | 2 | 千吨 | 2026-9 |
| 1990 | 2 | 千吨 | 2026-9 |
| 1989 | 20 | 千吨 | 2026-9 |
| 1988 | 25 | 千吨 | 2026-9 |
| 1987 | 65 | 千吨 | 2026-9 |
| 1986 | 65 | 千吨 | 2026-9 |
| 1985 | 86 | 千吨 | 2026-9 |
| 1984 | 100 | 千吨 | 2026-9 |
| 1983 | 51 | 千吨 | 2026-9 |
| 1982 | 39 | 千吨 | 2026-9 |
| 1981 | 110 | 千吨 | 2026-9 |
| 1980 | 50 | 千吨 | 2026-9 |
| 1979 | 0 | 千吨 | 2026-9 |
| 1978 | 5 | 千吨 | 2026-9 |
| 1977 | 6 | 千吨 | 2026-9 |
| 1976 | 5 | 千吨 | 2026-9 |
| 1975 | 6 | 千吨 | 2026-9 |