Year	Number
1982	17687
1983	23513
1984	28756
1985	39039
1986	55650
1987	37249
1988	46411
1989	62741
1990	67959
1991	74461
1992	104997
1993	149747
1994	144612
1995	163284
1996	175678
1997	168561
1998	184834
1999	172211
2000	218934
2001	192630
2002	191012
2003	193502
2004	222210
2005	230485
2006	254364
2007	270551
2008	276128
2009	221256
2010	264828
2011	333382
2012	345354
2013	341287
2014	330606