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	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	1187
1997	2842
1998	4473
1999	6387
2000	10398
2001	23997
2002	45974
2003	247223
2004	406861
2005	761986
2006	1512948
2007	2530891
2008	3438568
2009	4460543
2010	7440383
2011	10821930
2012	14612835
2013	19749371
2014	23505559
2015	22698915
2016	20217697
2017	22034110
2018	21955565
2019	22925482
2020	25315598
2021	24334901
2022	25869010