| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 2016 | 13 | 千吨 | 2026-9 |
| 2015 | 8 | 千吨 | 2026-9 |
| 2014 | 8 | 千吨 | 2026-9 |
| 2013 | 12 | 千吨 | 2026-9 |
| 2012 | 10 | 千吨 | 2026-9 |
| 2011 | 10 | 千吨 | 2026-9 |
| 2010 | 9 | 千吨 | 2026-9 |
| 2009 | 7 | 千吨 | 2026-9 |
| 2008 | 9 | 千吨 | 2026-9 |
| 2007 | 15 | 千吨 | 2026-9 |
| 2006 | 17 | 千吨 | 2026-9 |
| 2005 | 12 | 千吨 | 2026-9 |
| 2004 | 15 | 千吨 | 2026-9 |
| 2003 | 16 | 千吨 | 2026-9 |
| 2002 | 3 | 千吨 | 2026-9 |
| 2001 | 2 | 千吨 | 2026-9 |
| 2000 | 3 | 千吨 | 2026-9 |
| 1999 | 4 | 千吨 | 2026-9 |
| 1998 | 4 | 千吨 | 2026-9 |
| 1997 | 10 | 千吨 | 2026-9 |
| 1996 | 9 | 千吨 | 2026-9 |
| 1995 | 7 | 千吨 | 2026-9 |
| 1994 | 11 | 千吨 | 2026-9 |
| 1993 | 10 | 千吨 | 2026-9 |
| 1992 | 10 | 千吨 | 2026-9 |
| 1991 | 11 | 千吨 | 2026-9 |
| 1990 | 11 | 千吨 | 2026-9 |
| 1989 | 10 | 千吨 | 2026-9 |
| 1988 | 13 | 千吨 | 2026-9 |
| 1987 | 10 | 千吨 | 2026-9 |
| 1986 | 8 | 千吨 | 2026-9 |
| 1985 | 5 | 千吨 | 2026-9 |
| 1984 | 5 | 千吨 | 2026-9 |
| 1983 | 5 | 千吨 | 2026-9 |
| 1982 | 7 | 千吨 | 2026-9 |
| 1981 | 5 | 千吨 | 2026-9 |
| 1980 | 0 | 千吨 | 2026-9 |
| 1979 | 2 | 千吨 | 2026-9 |
| 1978 | 2 | 千吨 | 2026-9 |