Year	Total
1970	70920
1971	112590
1972	153360
1973	175530
1974	337760
1975	367900
1976	423750
1977	527470
1978	694130
1979	760620
1980	889160
1981	797850
1982	1140000
1983	1541600
1984	1794300
1985	2250800
1986	2621400
1987	2928100
1988	2946700
1989	3021200
1990	2750600
1991	2859500
1992	3239400
1993	3794700
1994	4144200
1995	4573900
1996	4998200
1997	5440600
1998	5699200
1999	6691800
2000	6741900
2001	6885300
2002	8318400
2003	9036800
2004	9938900
2005	9830200
2006	10037000
2007	10107000
2008	12571000
2009	10736000
2010	13135000
2011	15064000
2012	17343000
2013	19194000
2014	20417000
2015	20816000
2016	21131000