| 年度 | 数值 | 单位 | 发布日期 |
|---|---|---|---|
| 2016 | 31 | 千吨 | 2026-9 |
| 2015 | 34 | 千吨 | 2026-9 |
| 2014 | 33 | 千吨 | 2026-9 |
| 2013 | 32 | 千吨 | 2026-9 |
| 2012 | 35 | 千吨 | 2026-9 |
| 2011 | 35 | 千吨 | 2026-9 |
| 2010 | 34 | 千吨 | 2026-9 |
| 2009 | 33 | 千吨 | 2026-9 |
| 2008 | 33 | 千吨 | 2026-9 |
| 2007 | 34 | 千吨 | 2026-9 |
| 2006 | 31 | 千吨 | 2026-9 |
| 2005 | 29 | 千吨 | 2026-9 |
| 2004 | 36 | 千吨 | 2026-9 |
| 2003 | 34 | 千吨 | 2026-9 |
| 2002 | 35 | 千吨 | 2026-9 |
| 2001 | 70 | 千吨 | 2026-9 |
| 2000 | 73 | 千吨 | 2026-9 |
| 1999 | 74 | 千吨 | 2026-9 |
| 1998 | 73 | 千吨 | 2026-9 |
| 1997 | 62 | 千吨 | 2026-9 |
| 1983 | 90 | 千吨 | 2026-9 |
| 1982 | 85 | 千吨 | 2026-9 |
| 1981 | 82 | 千吨 | 2026-9 |
| 1980 | 73 | 千吨 | 2026-9 |
| 1979 | 64 | 千吨 | 2026-9 |
| 1978 | 61 | 千吨 | 2026-9 |
| 1977 | 53 | 千吨 | 2026-9 |
| 1976 | 50 | 千吨 | 2026-9 |
| 1975 | 45 | 千吨 | 2026-9 |