Year	Number of
1990	50852.31
1991	51404.87
1992	52524.41
1993	54049.17
1994	55239.72
1995	57102.83
1996	58125.33
1997	59682.13
1998	60509.93
1999	63206.51
2000	66657.47
2001	70653.87
2002	74978.23
2003	77303.72
2004	79293.24
2005	80807.31
2006	81731.16
2007	82589.06
2008	83108.7
2009	84068.73
2010	85251.09
2011	85988.45
2012	86916.23
2013	88829.09
2014	91294.71
2015	91751.2
2016	90615.19