Year	Number of
1990	72788.75
1991	76808.68
1992	81566.05
1993	86933.34
1994	92724.98
1995	98938.67
1996	105208.97
1997	111635.09
1998	118309.72
1999	125512.17
2000	133462.2
2001	140416.21
2002	147997.53
2003	156242.96
2004	165152.78
2005	174814.13
2006	183043.59
2007	191867.68
2008	201444.29
2009	211504.76
2010	222090.61
2011	231077.06
2012	240454.44
2013	250147.62
2014	260203.98
2015	270611.92
2016	280950.6