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	0
1994	0
1995	0
1996	0
1997	5734
1998	19000
1999	174000
2000	266441
2001	314002
2002	338779
2003	363651
2004	425745
2005	647110
2006	849146
2007	1225654
2008	1654721
2009	3991000
2010	7700000
2011	9200000
2012	12613935
2013	13633167
2014	11798652
2015	12757410
2016	12878926
2017	14092104