Year Number of 1990 863.31 1991 905.84 1992 950.5 1993 984.5 1994 1020.56 1995 1061.27 1996 1098.64 1997 1146.69 1998 1213.36 1999 1289.13 2000 1360.54 2001 1431.03 2002 1495.29 2003 1573.15 2004 1654.26 2005 1735.91 2006 1820.98 2007 1900.16 2008 1969.87 2009 2027.62 2010 2077.37 2011 2134.89 2012 2210.24 2013 2303.17 2014 2388.5 2015 2482.55 2016 2597.46