Year Number 1970 37504.64453125 1971 36742.5234375 1972 38771.3515625 1973 40044.2578125 1974 41012.421875 1975 41605.5546875 1976 42628.76953125 1977 43936.8828125 1978 45072.4921875 1979 46186.87890625 1980 47072.99609375 1981 48735.78515625 1982 50144.52734375 1983 52371.29296875 1984 54156.1328125 1985 55825 1986 57281.36328125 1987 58228.5546875 1988 59405.9453125 1989 60983.078125 1990 65516.69921875 1991 67891.1796875 1992 69858.359375 1993 71746.390625 1994 74614.7890625 1995 80478.2890625 1996 81574.3046875 1997 83607.7109375 1998 87546.3046875 1999 87753.9765625 2000 91804.4140625 2001 95204.6640625 2002 98199.2578125 2003 102305 2004 107566.703125 2005 109971.8359375 2006 113481.109375 2007 117125.25 2008 119949.15625 2009 123648.6796875 2010 127679.640625 2011 130036.625 2012 134035.25 2013 137274.859375 2014 139213.890625 2015 143534.359375 2016 154099.8125 2017 157521.546875 2018 152614.3125 2019 153312.125 2020 160156.96875 2021 161568.09375 2022 163013.0625