| 年度 | 实际值 |
|---|---|
| 1993 | 1696 |
| 1994 | 1740 |
| 1995 | 2108 |
| 1996 | 1240 |
| 1997 | 1184 |
| 1998 | 1149 |
| 1999 | 1028 |
| 2000 | 1253 |
| 2001 | 1137 |
| 2002 | 1191 |
| 2003 | 1261 |
| 2004 | 1475 |
| 2005 | 367 |
| 2006 | 1589 |
| 2007 | 2163 |
| 2008 | 2146 |
| 2009 | |
| 2010 | 2405 |
| 2011 | 1554 |
| 2012 | 1575 |
| 2013 | 1564 |
| 2014 | 1579 |
| 2015 | 1655 |
| 2016 | 1668 |
| 2017 | 1774 |
| 2018 | 1831 |