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	150
1994	2038
1995	3615
1996	5458
1997	8167
1998	11749
1999	28988
2000	61200
2001	87370
2002	105458
2003	151359
2004	206559
2005	300319
2006	411474
2007	740150
2008	756639
2009	925833
2010	1188080
2011	1259491
2012	1539306
2013	1610880
2014	1651861
2015	1878238
2016	2003780
2017	2062648
2018	2018233
2019	2056097
2020	1978393
2021	1982328