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	50
1996	1043
1997	2247
1998	5190
1999	16316
2000	25961
2001	36683
2002	44731
2003	49229
2004	54369
2005	58806
2006	70340
2007	77278
2008	93476
2009	110668
2010	117587
2011	126594
2012	136480
2013	136790
2014	151336
2015	148244
2016	151857
2017	167282
2018	178946
2019	193672
2020	183498
2021	183840
2022	205140