| 年度 | 实际值 |
|---|---|
| 1993 | 1358 |
| 1994 | 1301 |
| 1995 | 1339 |
| 1996 | 1320 |
| 1997 | 1068 |
| 1998 | 1301 |
| 1999 | 1398 |
| 2000 | 1231 |
| 2001 | 1219 |
| 2002 | 987 |
| 2003 | 974 |
| 2004 | 966 |
| 2005 | 1291 |
| 2006 | 1311 |
| 2007 | 1288 |
| 2008 | 1392 |
| 2009 | |
| 2010 | 1460 |
| 2011 | 1507 |
| 2012 | 1526 |
| 2013 | 1607 |
| 2014 | 1733 |
| 2015 | 1768 |
| 2016 | 2282 |
| 2017 | 2317 |
| 2018 | 2539 |