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	470
1991	4781
1992	4781
1993	4781
1994	1348
1995	4691
1996	11700
1997	17400
1998	18000
1999	72000
2000	86000
2001	100000
2002	450244
2003	1446927
2004	4882414
2005	13661355
2006	20997954
2007	27562721
2008	27031472
2009	32729824
2010	32780165
2011	35615926
2012	37527703
2013	39517045
2014	43298174
2015	43227643
2016	47041321
2017	45845665
2018	47154264
2019	45425533
2020	45555673
2021	47015757
2022	49018766