Year	Number of
1990	596.62
1991	630.45
1992	666.29
1993	704.25
1994	745.59
1995	791.4
1996	836.3
1997	885.55
1998	940.61
1999	1001.07
2000	1067.59
2001	1146.48
2002	1230.91
2003	1325.77
2004	1425.56
2005	1531.55
2006	1618.91
2007	1712.19
2008	1814.73
2009	1922.12
2010	2035.45
2011	2185.96
2012	2345.77
2013	2518.56
2014	2705.27
2015	2907.94
2016	3120.77