Year	Number of
1990	1569.21
1991	1600.94
1992	1626.87
1993	1703.07
1994	1774.82
1995	1835.08
1996	1958.93
1997	1991.17
1998	2046.22
1999	2097.64
2000	2150.27
2001	2208.01
2002	2258.28
2003	2314.8
2004	2376.19
2005	2442.13
2006	2503.8
2007	2562.86
2008	2619.69
2009	2695.47
2010	2771.4
2011	2834.05
2012	2899.47
2013	2974.69
2014	3057.11
2015	3147.42
2016	3231.73