Year	Total
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	364960
1979	613740
1980	779170
1981	918080
1982	1005200
1983	1247700
1984	1568400
1985	1996500
1986	2335000
1987	2615300
1988	2631800
1989	2731500
1990	2951200
1991	2992900
1992	3270700
1993	3139400
1994	3287200
1995	4604300
1996	4978100
1997	5662600
1998	5879800
1999	6196700
2000	9855700
2001	14729000
2002	15894000
2003	17509000
2004	17816000
2005	19909000
2006	23196000
2007	23497000
2008	23392000
2009	24306000
2010	26402000
2011	27817000
2012	28962000
2013	31310000
2014	29957000
2015	31268000
2016	31879000