| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 2016 | 430 | 千吨 | 2026-9 |
| 2015 | 268 | 千吨 | 2026-9 |
| 2014 | 260 | 千吨 | 2026-9 |
| 2013 | 244 | 千吨 | 2026-9 |
| 2012 | 254 | 千吨 | 2026-9 |
| 2011 | 238 | 千吨 | 2026-9 |
| 2010 | 286 | 千吨 | 2026-9 |
| 2009 | 401 | 千吨 | 2026-9 |
| 2008 | 399 | 千吨 | 2026-9 |
| 2007 | 482 | 千吨 | 2026-9 |
| 2006 | 343 | 千吨 | 2026-9 |
| 2005 | 219 | 千吨 | 2026-9 |
| 2004 | 174 | 千吨 | 2026-9 |
| 2003 | 453 | 千吨 | 2026-9 |
| 2002 | 436 | 千吨 | 2026-9 |
| 2001 | 448 | 千吨 | 2026-9 |
| 2000 | 588 | 千吨 | 2026-9 |
| 1999 | 555 | 千吨 | 2026-9 |
| 1998 | 397 | 千吨 | 2026-9 |
| 1997 | 367 | 千吨 | 2026-9 |
| 1996 | 633 | 千吨 | 2026-9 |
| 1995 | 547 | 千吨 | 2026-9 |
| 1994 | 323 | 千吨 | 2026-9 |
| 1993 | 224 | 千吨 | 2026-9 |
| 1992 | 165 | 千吨 | 2026-9 |
| 1991 | 123 | 千吨 | 2026-9 |
| 1990 | 65 | 千吨 | 2026-9 |
| 1989 | 49 | 千吨 | 2026-9 |
| 1988 | 22 | 千吨 | 2026-9 |
| 1987 | 0 | 千吨 | 2026-9 |