| 年度 | 实际值 |
|---|---|
| 1993 | 1198 |
| 1994 | 1221 |
| 1995 | 1222 |
| 1996 | 794 |
| 1997 | 1546 |
| 1998 | 1136 |
| 1999 | 1218 |
| 2000 | 987 |
| 2001 | 1129 |
| 2002 | 1096 |
| 2003 | 966 |
| 2004 | 1279 |
| 2005 | 1300 |
| 2006 | 1348 |
| 2007 | 1747 |
| 2008 | 1813 |
| 2009 | |
| 2010 | 1992 |
| 2011 | 2232 |
| 2012 | 2390 |
| 2013 | 3968 |
| 2014 | 4052 |
| 2015 | 4201 |
| 2016 | 4437 |
| 2017 | 4677 |
| 2018 | 5123 |