| 年度 | 数值 | 单位 | 发布日期 |
| 2016 | 1601 | 千吨 | 2026-9 |
| 2015 | 1564 | 千吨 | 2026-9 |
| 2014 | 1362 | 千吨 | 2026-9 |
| 2013 | 1386 | 千吨 | 2026-9 |
| 2012 | 1295 | 千吨 | 2026-9 |
| 2011 | 1219 | 千吨 | 2026-9 |
| 2010 | 1067 | 千吨 | 2026-9 |
| 2009 | 1023 | 千吨 | 2026-9 |
| 2008 | 863 | 千吨 | 2026-9 |
| 2007 | 922 | 千吨 | 2026-9 |
| 2006 | 957 | 千吨 | 2026-9 |
| 2005 | 979 | 千吨 | 2026-9 |
| 2004 | 826 | 千吨 | 2026-9 |
| 2003 | 814 | 千吨 | 2026-9 |
| 2002 | 711 | 千吨 | 2026-9 |
| 2001 | 694 | 千吨 | 2026-9 |
| 2000 | 744 | 千吨 | 2026-9 |
| 1999 | 592 | 千吨 | 2026-9 |
| 1998 | 595 | 千吨 | 2026-9 |
| 1997 | 696 | 千吨 | 2026-9 |
| 1996 | 597 | 千吨 | 2026-9 |
| 1995 | 579 | 千吨 | 2026-9 |
| 1994 | 409 | 千吨 | 2026-9 |
| 1993 | 440 | 千吨 | 2026-9 |
| 1992 | 436 | 千吨 | 2026-9 |
| 1991 | 482 | 千吨 | 2026-9 |
| 1990 | 470 | 千吨 | 2026-9 |
| 1989 | 432 | 千吨 | 2026-9 |
| 1988 | 439 | 千吨 | 2026-9 |
| 1987 | 416 | 千吨 | 2026-9 |
| 1986 | 376 | 千吨 | 2026-9 |
| 1985 | 376 | 千吨 | 2026-9 |
| 1984 | 382 | 千吨 | 2026-9 |