| 年度 | 实际值 |
|---|---|
| 1993 | 1094 |
| 1994 | 1245 |
| 1995 | 1343 |
| 1996 | 1364 |
| 1997 | 1025 |
| 1998 | 1209 |
| 1999 | 1176 |
| 2000 | 1504 |
| 2001 | 1586 |
| 2002 | 1146 |
| 2003 | 1532 |
| 2004 | 1550 |
| 2005 | 1628 |
| 2006 | 1715 |
| 2007 | 1890 |
| 2008 | 1779 |
| 2009 | 1834 |
| 2010 | 1993 |
| 2011 | 2117 |
| 2012 | 2175 |
| 2013 | 2294 |
| 2014 | 2482 |
| 2015 | 2720 |
| 2016 | 5216 |
| 2017 | 2918 |
| 2018 | 3383 |