Year Total 1965 2424000 1966 2704000 1967 3023000 1968 3364000 1969 3651000 1970 4101000 1971 4525000 1972 4984000 1973 5401000 1974 5352000 1975 5232000 1976 5305000 1977 5658000 1978 6041000 1979 6350000 1980 5716000 1981 5063000 1982 4414000 1983 4008000 1984 3942000 1985 3930000 1986 4869000 1987 4260000 1988 3845000 1989 3956000 1990 4409000 1991 4850000 1992 5074000 1993 5139000 1994 5612000 1995 5713000 1996 6001000 1997 6578000 1998 7361000 1999 8343000 2000 8216000 2001 8967000 2002 8785000 2003 8534000 2004 8854000 2005 9310000 2006 9277000 2007 9416000 2008 9031000 2009 8048800 2010 7645000 2011 6824000 2012 6495000 2013 6547000 2014 6471000 2015 6814000 2016 7041000