Year	Number of
1990	36599.22
1991	37142.01
1992	37753.9
1993	38397.95
1994	39079.55
1995	39806.38
1996	40240.38
1997	40740.02
1998	41270.76
1999	41789.2
2000	42373.61
2001	42370.66
2002	42350.34
2003	42327.65
2004	42367.57
2005	42515.65
2006	42259.59
2007	42037.48
2008	41831.19
2009	41675.43
2010	41592.55
2011	42184.57
2012	42772.97
2013	43357.32
2014	43956.37
2015	44579.66
2016	45229.22