Year	Number
1982	49465
1983	54233
1984	48488
1985	55728
1986	93744
1987	74669
1988	90486
1989	106871
1990	117938
1991	119910
1992	162330
1993	204774
1994	216821
1995	235613
1996	261044
1999	256554
2000	354993
2001	309919
2002	296388
2003	319781
2004	355702
2005	387521
2006	428549
2007	444252
2008	452853
2009	352217
2010	443649
2011	477719
2012	488525
2013	516632
2014	496724
2016	409280