Year Total 1965 4359600 1966 4695200 1967 5202900 1968 5704200 1969 6591600 1970 7161700 1971 7564000 1972 7918000 1973 8916000 1974 9377000 1975 9721000 1976 9866000 1977 9990000 1978 11218000 1979 12082000 1980 12364000 1981 12996000 1982 12418000 1983 14347000 1984 14322000 1985 14922000 1986 15113000 1987 16182000 1988 17523000 1989 17503000 1990 12731000 1991 10240000 1992 10762000 1993 10133000 1994 10415000 1995 10787000 1996 10748000 1997 9715500 1998 8056300 1999 6861100 2000 7493200 2001 7648900 2002 8818900 2003 9423300 2004 9311400 2005 8787900 2006 9514800 2007 10145000 2008 9602800 2009 7555800 2010 7008200 2011 8161700 2012 7603400 2013 5755000 2014 5745500 2015 5914400 2016 5403900