Year	Number
1960	0
1965	0
1970	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	3798
1987	7223
1988	19154
1989	30791
1990	42880
1991	51420
1992	61460
1993	67771
1994	128071
1995	235258
1996	478172
1997	974494
1998	1756287
1999	3186602
2000	5629000
2001	7697000
2002	8101777
2003	8605834
2004	9131705
2005	9604695
2006	9847375
2007	10738121
2008	11341704
2009	11775240
2010	12154041
2011	12495934
2012	12313375
2013	12315217
2014	12734724
2015	12774090
2016	12550821
2017	11357286
2018	11447351
2019	11509573
2020	11529728
2021	11740118
2022	11873986