| 年度 | 数值 | 单位 | 发布日期 |
|---|---|---|---|
| 2004 | 21 | 千吨 | 2026-9 |
| 2003 | 21 | 千吨 | 2026-9 |
| 2002 | 25 | 千吨 | 2026-9 |
| 2001 | 23 | 千吨 | 2026-9 |
| 2000 | 25 | 千吨 | 2026-9 |
| 1999 | 26 | 千吨 | 2026-9 |
| 1998 | 23 | 千吨 | 2026-9 |
| 1997 | 27 | 千吨 | 2026-9 |
| 1996 | 26 | 千吨 | 2026-9 |
| 1995 | 29 | 千吨 | 2026-9 |
| 1994 | 26 | 千吨 | 2026-9 |
| 1993 | 28 | 千吨 | 2026-9 |
| 1992 | 27 | 千吨 | 2026-9 |
| 1991 | 20 | 千吨 | 2026-9 |
| 1990 | 17 | 千吨 | 2026-9 |
| 1989 | 17 | 千吨 | 2026-9 |
| 1988 | 16 | 千吨 | 2026-9 |
| 1987 | 16 | 千吨 | 2026-9 |
| 1986 | 16 | 千吨 | 2026-9 |
| 1985 | 15 | 千吨 | 2026-9 |
| 1984 | 13 | 千吨 | 2026-9 |
| 1983 | 18 | 千吨 | 2026-9 |
| 1982 | 20 | 千吨 | 2026-9 |
| 1981 | 17 | 千吨 | 2026-9 |
| 1980 | 14 | 千吨 | 2026-9 |
| 1979 | 15 | 千吨 | 2026-9 |
| 1978 | 12 | 千吨 | 2026-9 |