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
1990	1772
1991	3025
1992	4103
1993	8304
1994	15623
1995	35881
1996	43524
1997	45000
1998	49129
1999	66000
2000	95000
2001	143004
2002	153647
2003	177365
2004	202454
2005	232900
2006	301400
2007	366138
2008	398857
2009	412882
2010	435104
2011	443161
2012	469740
2013	468814
2014	452054
2015	463384
2016	523453
2017	544732
2018	565949
2019	574799
2020	536589
2021	603486
2022	528723