Year	Number of
1990	2160.39
1991	2220.19
1992	2288.35
1993	2363.4
1994	2443.02
1995	2526.49
1996	2575.67
1997	2625.76
1998	2677.2
1999	2730.11
2000	2786.84
2001	2830.83
2002	2881.67
2003	2938.9
2004	3000.31
2005	3066.78
2006	3109.4
2007	3155.16
2008	3208.15
2009	3264.8
2010	3325.69
2011	3437.78
2012	3557.05
2013	3682.26
2014	3815.65
2015	3957.57
2016	4100.75