| 1991 | 5 | 3 | 
 | 1 | 
 | 1 | 
 | 
 | 
 | 
| 1992 | 5 | 2 | 
 | 1 | 
 | 2 | 
 | 
 | 
 | 
| 1993 | 4 | 
 | 
 | 1 | 
 | 3 | 
 | 
 | 
 | 
| 1994 | 6 | 1 | 
 | 4 | 
 | 1 | 
 | 
 | 
 | 
| 1995 | 2 | 
 | 
 | 1 | 
 | 
 | 
 | 1 | 
 | 
| 1996 | 4 | 2 | 1 | 1 | 
 | 1 | 
 | 
 | 
 | 
| 1997 | 2 | 
 | 
 | 2 | 
 | 
 | 
 | 
 | 
 | 
| 1998 | 1 | 
 | 
 | 
 | 
 | 1 | 
 | 
 | 
 | 
| 1999 | 2 | 
 | 
 | 1 | 
 | 
 | 
 | 1 | 
 | 
| 2000 | 4 | 1 | 
 | 2 | 
 | 1 | 
 | 
 | 
 | 
| 2001 | 4 | 4 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
| 2002 | 2 | 
 | 
 | 
 | 
 | 2 | 
 | 
 | 
 | 
| 2003 | 3 | 1 | 
 | 1 | 
 | 1 | 
 | 
 | 
 | 
| 2004 | 4 | 1 | 
 | 2 | 
 | 
 | 
 | 1 | 
 | 
| 2005 | 6 | 1 | 
 | 1 | 
 | 3 | 
 | 1 | 
 | 
| 2006 | 3 | 1 | 
 | 2 | 
 | 
 | 
 | 
 | 
 | 
| 2007 | 4 | 
 | 
 | 1 | 
 | 1 | 
 | 2 | 
 | 
| 2008 | 6 | 2 | 
 | 1 | 
 | 3 | 
 | 
 | 
 | 
| 2009 | 4 | 1 | 
 | 1 | 
 | 1 | 
 | 1 | 
 | 
| 2010 | 5 | 2 | 
 | 
 | 
 | 2 | 
 | 1 | 
 | 
| 2011 | 3 | 
 | 
 | 1 | 
 | 1 | 
 | 1 | 
 | 
| 2012 | 6 | 1 | 
 | 5 | 
 | 
 | 
 | 
 | 
 | 
| 2013 | 5 | 1 | 
 | 2 | 
 | 1 | 
 | 1 | 
 | 
| 2014 | 3 | 2 | 
 | 
 | 
 | 1 | 
 | 
 | 
 | 
| 2015 | 5 | 2 | 
 | 1 | 
 | 1 | 
 | 1 | 
 | 
| 2016 | 6 | 1 | 
 | 1 | 
 | 2 | 
 | 2 | 
 | 
| 2017 | 2 | 1 | 
 | 1 | 
 | 
 | 
 | 
 | 
 | 
| 2018 | 4 | 3 | 1 | 1 | 
 | 
 | 
 | 
 | 
 | 
| 2019 | 3 | 
 | 
 | 2 | 
 | 
 | 
 | 1 | 
 | 
| 合计 | 118 | 35 | 3 | 39 | 0 | 30 | 0 | 14 | 0 | 
| 百分比 | 
 | 29.7 | 0.3 | 33.1 | 
 | 25.4 | 
 | 11.9 | 
 |