Year	Number of
1990	1014.92
1991	1059.77
1992	1106.69
1993	1155.72
1994	1206.9
1995	1260.91
1996	1300.43
1997	1342.35
1998	1386.82
1999	1433.19
2000	1481.81
2001	1541.46
2002	1604.95
2003	1672.87
2004	1745.31
2005	1823.01
2006	1871.7
2007	1924.48
2008	1982.39
2009	2043.81
2010	2108.97
2011	2193.27
2012	2284.3
2013	2381.33
2014	2486.32
2015	2599.8
2016	2720.33