Year Number 1970 184623.078125 1971 188293.875 1972 211624.546875 1973 235999 1974 248822.546875 1975 275539.03125 1976 313268.03125 1977 344234.375 1978 392918.90625 1979 431144.875 1980 474692.71875 1981 511879.6875 1982 548903.8125 1983 622876 1984 666031.0625 1985 715441.3125 1986 768829.3125 1987 819531.4375 1988 865923.125 1989 877590.3125 1990 928620 1991 986378.0625 1992 1001048.6875 1993 1047547.1875 1994 1099685.375 1995 1142071.25 1996 1210683.875 1997 1288073.375 1998 1341353.5 1999 1387519.75 2000 1450543 2001 1498830 2002 1523225.125 2003 1601236.375 2004 1630659.75 2005 1666779.875 2006 1718840.25 2007 1762956.75 2008 1812673.375 2009 1879689 2010 1885160.5 2011 1960404.375 2012 1967336 2013 1908382.625 2014 1874110.625 2015 1881764.875 2016 1898666.375 2017 1910442.125 2018 1937946.875 2019 1948391.5 2020 1956801.875 2021 1973251.75 2022 1940459.875