Year	Number
1960	0
1965	0
1970	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	20362
1982	27236
1983	36294
1984	57914
1985	73000
1986	112600
1987	173000
1988	243000
1989	349000
1990	461200
1991	568200
1992	656000
1993	774500
1994	1381000
1995	2008000
1996	2492000
1997	3169000
1998	4109000
1999	5126000
2000	6372300
2001	7178000
2002	7949000
2003	8801000
2004	8785000
2005	9104000
2006	9607000
2007	10116852
2008	10014000
2009	10440000
2010	10992407
2011	11454252
2012	11848449
2013	12014368
2014	12312533
2015	12638827
2016	12543188
2017	12519313
2018	12626282
2019	12895854
2020	12791840
2021	13015553
2022	13194189