Year	Number of
1990	1203.72
1991	1328.53
1992	1469.46
1993	1621.25
1994	1788.31
1995	1974.45
1996	2154.48
1997	2357.68
1998	2586.57
1999	2839.2
2000	3116.5
2001	3303.23
2002	3502.28
2003	3713.25
2004	3940.61
2005	4183.06
2006	4383.18
2007	4595.72
2008	4812.39
2009	5042.27
2010	5283.14
2011	5551.4
2012	5831.45
2013	6121.17
2014	6421.79
2015	6726.98
2016	7039.86