Year Number 1970 12138.96875 1971 12736.3857421875 1972 13545.6669921875 1973 14008.427734375 1974 14243.173828125 1975 14847.6396484375 1976 15944.8115234375 1977 17719.9453125 1978 20241.82421875 1979 23078.17578125 1980 25152.724609375 1981 28287.587890625 1982 33627.08984375 1983 37791.98828125 1984 44809.0234375 1985 45663.73046875 1986 50536.578125 1987 59680.453125 1988 67481.8125 1989 68120.9609375 1990 70493.9609375 1991 70477.7421875 1992 75881.6875 1993 79558.8671875 1994 83086.65625 1995 77877.046875 1996 78431.4453125 1997 78227.796875 1998 78561.7578125 1999 79084.25 2000 85282.65625 2001 94245.8359375 2002 94757.5234375 2003 111535.96875 2004 100959.734375 2005 102994.6484375 2006 139153.53125 2007 134033.4375 2008 192516.875 2009 224949.546875 2010 270285.875 2011 390390.125 2012 344259.5625 2013 457830.875 2014 419632.375 2015 460075.09375 2016 450135.53125 2017 482249.5 2018 512888.40625 2019 561399.8125 2020 616037.25 2021 637205 2022 659464.5625