| 年度 | 实际值 |
|---|---|
| 1978 | 504 |
| 1979 | 525 |
| 1980 | 630 |
| 1981 | 562 |
| 1982 | 617 |
| 1983 | 651 |
| 1984 | 680 |
| 1985 | 872 |
| 1986 | 1037 |
| 1987 | 1221 |
| 1988 | 1559 |
| 1989 | 1799 |
| 1990 | 1861 |
| 1991 | 2046 |
| 1992 | 2322 |
| 1993 | 3384 |
| 1994 | 4662 |
| 1995 | 5527 |
| 1996 | 6766 |
| 1997 | 7539 |
| 1998 | 7916 |
| 1999 | 9168 |
| 2000 | 10604 |
| 2001 | 12782 |
| 2002 | 13847 |
| 2003 | 15292 |
| 2004 | 17443 |
| 2005 | 18042 |
| 2006 | 18889 |
| 2007 | 22079 |
| 2008 | 25150 |
| 2009 | 28508 |
| 2010 | 32331 |
| 2011 | 35315 |
| 2012 | 39468 |
| 2013 | 42717 |
| 2014 | 47338 |
| 2015 | 51608 |