| 年度 | 实际值 |
|---|---|
| 1981 | 589 |
| 1982 | 609 |
| 1983 | 631 |
| 1984 | 779 |
| 1985 | 1012 |
| 1986 | 1208 |
| 1987 | 1303 |
| 1988 | 1693 |
| 1989 | 1759 |
| 1990 | 1920 |
| 1991 | 1973 |
| 1992 | 2415 |
| 1993 | 3125 |
| 1994 | 4401 |
| 1995 | 5274 |
| 1996 | 6059 |
| 1997 | 7112 |
| 1998 | 8329 |
| 1999 | 9685 |
| 2000 | 10234 |
| 2001 | 12290 |
| 2002 | 14971 |
| 2003 | 15760 |
| 2004 | 17901 |
| 2005 | 18677 |
| 2006 | 20615 |
| 2007 | 25270 |
| 2008 | 29189 |
| 2009 | 31744 |
| 2010 | 36587 |
| 2011 | 38193 |
| 2012 | 42518 |
| 2013 | 50824 |
| 2014 | 51376 |
| 2015 | 54449 |