| 年度 | 实际值 |
|---|---|
| 1993 | 933 |
| 1994 | 977 |
| 1995 | 1007 |
| 1996 | 1196 |
| 1997 | 1271 |
| 1998 | 1286 |
| 1999 | 1311 |
| 2000 | 1256 |
| 2001 | 1365 |
| 2002 | 1279 |
| 2003 | 1277 |
| 2004 | 1285 |
| 2005 | 780 |
| 2006 | 1652 |
| 2007 | 1415 |
| 2008 | 1462 |
| 2009 | |
| 2010 | 1455 |
| 2011 | 1896 |
| 2012 | 1876 |
| 2013 | 1937 |
| 2014 | 1995 |
| 2015 | 1404 |
| 2016 | 1467 |
| 2017 | 2118 |
| 2018 | 2229 |