Year	Number of
1990	2528.78
1991	2744.03
1992	2981.23
1993	3230.05
1994	3499.32
1995	3789.83
1996	4165.79
1997	4586.03
1998	5060.13
1999	5582.69
2000	6152.05
2001	6337.88
2002	6537.52
2003	6749.59
2004	6975.36
2005	7207.14
2006	7373.51
2007	7549.75
2008	7728.98
2009	7918.54
2010	8112.65
2011	8384.36
2012	8671.59
2013	8970.65
2014	9282.7
2015	9608.75
2016	9947.23