Year	Number of
1990	37299.36
1991	38244.96
1992	39229.2
1993	40170.41
1994	41142.07
1995	42161.03
1996	42948.58
1997	43772.53
1998	44623.94
1999	45488.76
2000	46354.76
2001	46615.38
2002	46881.02
2003	47218.22
2004	47672.33
2005	48181.85
2006	48798.96
2007	49449.94
2008	50108.66
2009	50751.98
2010	51423.28
2011	51832.51
2012	52260.03
2013	52812.81
2014	53380.41
2015	53962.41
2016	54568.26