Year	Number of
1990	3589.68
1991	3766.67
1992	3955.19
1993	4151.5
1994	4350.9
1995	4563.05
1996	4725.27
1997	4900.67
1998	5084.93
1999	5270.75
2000	5463.87
2001	5614.38
2002	5776.29
2003	5945.64
2004	6124.28
2005	6317.92
2006	6575.35
2007	6857.89
2008	7159.29
2009	7483.55
2010	7831.4
2011	8072.96
2012	8332.31
2013	8597.68
2014	8844.63
2015	9112.87
2016	9392.38