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	1027
1993	3800
1994	8364
1995	15003
1996	28500
1997	77100
1998	167460
1999	274344
2000	401272
2001	656835
2002	917196
2003	1219550
2004	1536712
2005	1871602
2006	2183696
2007	2217008
2008	2298610
2009	2303600
2010	2306100
2011	2309000
2012	2630873
2013	2558000
2014	2384000
2015	2590000
2016	2650273
2017	2464122
2018	2070180
2019	2071652
2020	2051359
2021	2161725
2022	2167034