Year Number 1970 396369.9375 1971 423112.8125 1972 480516.21875 1973 518902.4375 1974 614589.8125 1975 654944.9375 1976 715040.3125 1977 774293.6875 1978 807531.1875 1979 833411.1875 1980 853739.875 1981 875437.5 1982 896467.4375 1983 925646.9375 1984 956838.1875 1985 992290.8125 1986 1043417.75 1987 1098958.625 1988 1145128.5 1989 1181201.875 1990 1214347.25 1991 1251266.25 1992 1281715.25 1993 1310587.5 1994 1352110.375 1995 1389336.625 1996 1454151.125 1997 1484244.75 1998 1581342.75 1999 1663189.375 2000 1701021.5 2001 1635554.875 2002 2022425 2003 2155254 2004 2233934.25 2005 2310777 2006 1956271.125 2007 1958221.25 2008 2073595.5 2009 2109546.25 2010 2152072 2011 2183890.25 2012 2217640.75 2013 2250936 2014 2321577.5 2015 2327372.75 2016 2337357 2017 2319248.5 2018 2334418.75 2019 2343317.5 2020 2354401.75 2021 2395732.5 2022 2440924.25