| 年度 | 实际值 |
|---|---|
| 1978 | 54 |
| 1979 | 62 |
| 1980 | 93 |
| 1981 | 125 |
| 1982 | 133 |
| 1983 | 229 |
| 1984 | 339 |
| 1985 | 345 |
| 1986 | 586 |
| 1987 | 603 |
| 1988 | 609 |
| 1989 | 841 |
| 1990 | 3115 |
| 1991 | 5229 |
| 1992 | 6922 |
| 1993 | 6346 |
| 1994 | 15485 |
| 1995 | 16768 |
| 1996 | 21446 |
| 1997 | 25865 |
| 1998 | 27999 |
| 1999 | 30103 |
| 2000 | 28842 |
| 2001 | 32715 |
| 2002 | 40691 |
| 2003 | 49018 |
| 2004 | 52422 |
| 2005 | 61008 |
| 2006 | 73949 |
| 2007 | 67071 |
| 2008 | 91422 |
| 2009 | 108482 |
| 2010 | 136373 |
| 2011 | 156623 |
| 2012 | 168001 |
| 2013 | 208618 |
| 2014 | 224341 |
| 2015 | 272386 |