Year	Number of
1990	1312.27
1991	1343.86
1992	1360.56
1993	1423.26
1994	1490.64
1995	1534.91
1996	1594.52
1997	1657.24
1998	1691.74
1999	1750.43
2000	1796.57
2001	1901.04
2002	1984.56
2003	2068.68
2004	2138.97
2005	2213.06
2006	2316.49
2007	2401.8
2008	2517.5
2009	2646.05
2010	2754.47
2011	2847.15
2012	2906.13
2013	2943.87
2014	2989.12
2015	3073.22
2016	3160.1