
		CN		CN		CN		
		BJ		SH		SZ		
1998		27.0		7.0		47.0		
1999		29.0		9.0		49.0		
2000		31.0		11.0		51.0		
2001		33.0		13.0		53.0		
2002		35.0		15.0		55.0		