Year	Total
1971	52790
1972	36290
1973	36110
1974	36110
1975	42990
1976	47890
1977	51590
1978	68790
1979	85980
1980	127900
1981	129600
1982	134100
1983	105200
1984	137500
1985	127000
1986	121000
1987	119000
1988	154000
1989	330000
1990	461700
1991	543200
1992	621500
1993	684900
1994	794800
1995	909900
1996	1033000
1997	1002000
1998	954000
1999	1184000
2000	1251000
2001	1566000
2002	1565000
2003	1633000
2004	1532000
2005	1457000
2006	1755000
2007	1981000
2008	2234000
2009	2578000
2010	2369000