Year	Number of
1990	25021.98
1991	26309.9
1992	27740.86
1993	29361.03
1994	31026.08
1995	32737.11
1996	34449.61
1997	36138.44
1998	37867.28
1999	39791.18
2000	41983.45
2001	44216.7
2002	46625.48
2003	49247.93
2004	52041.25
2005	55042.67
2006	58243.84
2007	61694.31
2008	65607.51
2009	69804.19
2010	74343.87
2011	78660.59
2012	83317.81
2013	88342.4
2014	93850.26
2015	99915.47
2016	106516.94