Year Number of 1990 1745.82 1991 1798.13 1992 1813.51 1993 1846.05 1994 1878.5 1995 1925 1996 1967.82 1997 2029.23 1998 2072.95 1999 2124.52 2000 2191.42 2001 2259.04 2002 2341.72 2003 2403.31 2004 2472.45 2005 2513.71 2006 2555.58 2007 2618.85 2008 2673.56 2009 2714.12 2010 2772.84 2011 2777.25 2012 2880.91 2013 2947.48 2014 2999.8 2015 2950.06 2016 2994.78