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	2642
1987	5008
1988	6519
1989	7893
1990	10010
1991	12889
1992	15251
1993	17409
1994	21845
1995	30883
1996	46805
1997	65368
1998	104280
1999	172614
2000	214896
2001	248131
2002	260438
2003	279670
2004	290068
2005	283108
2006	301922
2007	326098
2008	336922
2009	339715
2010	341077
2011	344085
2012	352114
2013	356264
2014	370047
2015	383919
2016	401613
2017	401231
2018	411361
2019	413446
2020	421384
2021	437270
2022	456864