Year Number 1970 53809.3359375 1971 54710.046875 1972 65241.1328125 1973 75172.203125 1974 81137.1484375 1975 92666.109375 1976 105094.390625 1977 117381.765625 1978 130894.6953125 1979 141417.703125 1980 154097.359375 1981 166775.484375 1982 179132.75 1983 203613.953125 1984 231532.765625 1985 250264.359375 1986 273902.59375 1987 298207 1988 321416.375 1989 332779.59375 1990 362408.40625 1991 389036.5 1992 400165.21875 1993 421127.34375 1994 447852.625 1995 469808.59375 1996 501103.71875 1997 534275.1875 1998 568025.875 1999 598563.5625 2000 623043.9375 2001 648484.0625 2002 664884.8125 2003 708189.125 2004 723258.4375 2005 747043.625 2006 776435.5625 2007 802895.6875 2008 832175.0625 2009 868668.8125 2010 875926.375 2011 915314.9375 2012 925728.1875 2013 899311.0625 2014 885455.4375 2015 891748.0625 2016 902737.4375 2017 913357.6875 2018 935820.6875 2019 943951.6875 2020 952254.375 2021 962105.25 2022 957315.8125