Year	Total
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	500
1994	902
1995	3731
1996	9510
1997	17232
1998	26826
1999	40389
2000	53128
2001	128012
2002	186900
2003	320815
2004	544100
2005	720000
2006	2530365
2007	5691458
2008	12375274
2009	16417914
2010	20952000
2011	25441789
2012	20274090
2013	21500000
2014	21639200
2015	21783300
2016	23265389
2017	24265460