Year	Number of
1990	1330.84
1991	1393.02
1992	1454.54
1993	1510.53
1994	1563.4
1995	1652.3
1996	1734.51
1997	1798.2
1998	1890.58
1999	2004.66
2000	2089.76
2001	2162.94
2002	2248.64
2003	2330.94
2004	2392.94
2005	2474.08
2006	2588.47
2007	2695.06
2008	2781.94
2009	2902.39
2010	3017.41
2011	3101.42
2012	3175.24
2013	3306.59
2014	3430
2015	3556.86
2016	3688.12