Year	Number of
1990	1692.61
1991	1788.2
1992	1892.43
1993	2005.38
1994	2126.18
1995	2255.84
1996	2337.05
1997	2422.37
1998	2512.64
1999	2608.81
2000	2712.22
2001	2789.7
2002	2874.03
2003	2966.02
2004	3063.09
2005	3165.12
2006	3239.77
2007	3314.36
2008	3393.12
2009	3477.85
2010	3570.86
2011	3678.87
2012	3799.27
2013	3927.64
2014	4063.33
2015	4205.4
2016	4349.7