| 年度 | 数值 | 单位 | 发布日期 |
|---|---|---|---|
| 2007 | 10 | 千吨 | 2026-9 |
| 2006 | 10 | 千吨 | 2026-9 |
| 2005 | 12 | 千吨 | 2026-9 |
| 2004 | 12 | 千吨 | 2026-9 |
| 2003 | 13 | 千吨 | 2026-9 |
| 2002 | 12 | 千吨 | 2026-9 |
| 2001 | 12 | 千吨 | 2026-9 |
| 2000 | 10 | 千吨 | 2026-9 |
| 1999 | 10 | 千吨 | 2026-9 |
| 1998 | 9 | 千吨 | 2026-9 |
| 1997 | 8 | 千吨 | 2026-9 |
| 1996 | 7 | 千吨 | 2026-9 |
| 1995 | 6 | 千吨 | 2026-9 |
| 1994 | 7 | 千吨 | 2026-9 |
| 1993 | 5 | 千吨 | 2026-9 |
| 1992 | 4 | 千吨 | 2026-9 |
| 1991 | 3 | 千吨 | 2026-9 |
| 1990 | 3 | 千吨 | 2026-9 |
| 1989 | 2 | 千吨 | 2026-9 |
| 1988 | 0 | 千吨 | 2026-9 |
| 1987 | 0 | 千吨 | 2026-9 |
| 1986 | 0 | 千吨 | 2026-9 |
| 1985 | 0 | 千吨 | 2026-9 |
| 1984 | 0 | 千吨 | 2026-9 |