Year	Number of
1990	1861.13
1991	1966.08
1992	2079.25
1993	2201.14
1994	2333.51
1995	2477.47
1996	2628.44
1997	2790.25
1998	2965.43
1999	3148.42
2000	3340.05
2001	3545.74
2002	3763.2
2003	4009.16
2004	4274.3
2005	4563.34
2006	4816.4
2007	5090.33
2008	5394.69
2009	5720.82
2010	6070.08
2011	6404.81
2012	6760.24
2013	7132.25
2014	7532.47
2015	7966.56
2016	8412.58