Year	Number of
1990	1255.26
1991	1326.97
1992	1403.89
1993	1488.3
1994	1578.27
1995	1674.52
1996	1786.53
1997	1905.62
1998	2034.78
1999	2171.93
2000	2318.36
2001	2421.1
2002	2527.78
2003	2645.08
2004	2767.66
2005	2897.1
2006	3021.19
2007	3151.79
2008	3299.02
2009	3453.38
2010	3615.99
2011	3770.53
2012	3933.99
2013	4109.48
2014	4296.38
2015	4495.67
2016	4711.8