Year Number 1980 1185852.375 1981 1213669.25 1982 1237051 1983 1259457.125 1984 1282796.125 1985 1308076.375 1986 1333166.375 1987 1371908.125 1988 1407965.875 1989 1431778.125 1990 1464752.5 1991 1495629.75 1992 1541836.875 1993 1584732.125 1994 1606248.25 1995 1603586.125 1996 1624279.625 1997 1605201.25 1998 1592154.625 1999 1559525.125 2000 1520279.875 2001 1502245.375 2002 1467892.875 2003 1422132.75 2004 1489448 2005 1433472 2006 1412001 2007 1414402.625 2008 1415826.375 2009 1401196.625 2010 1396250.125 2011 1392878.25 2012 1398898 2013 1364965.375 2014 1384887.5 2015 1424402.375 2016 1441186.25 2017 1445329.375 2018 1540274.375 2019 1519544.5 2020 1416322.25 2021 1450411.25 2022 1464383.625