Year Total 1985 137710000000 1986 140290000000 1987 145830000000 1988 144340000000 1989 145460000000 1990 136360000000.00002 1991 134710000000.00002 1992 132729999999.99998 1993 133870000000 1994 135350000000 1995 139010000000 1996 143170000000 1997 142770000000 1998 142770000000 1999 142130000000 2000 145180000000 2001 145660000000 2002 144130000000 2003 151630000000 2004 154160000000 2005 156940000000 2006 161740000000 2007 159350000000 2008 155310000000 2009 151720000000 2010 157660000000 2011 163550000000 2012 162140000000 2013 164560000000 2014 159060000000 2015 164940000000 2016 166570000000