Year	Number of
1990	1146.52
1991	1177.51
1992	1268.8
1993	1372.6
1994	1444.42
1995	1552.56
1996	1613.05
1997	1661.74
1998	1708.8
1999	1721.71
2000	1776.39
2001	1821.11
2002	1878.97
2003	1953.27
2004	2048.07
2005	2146.03
2006	2253.76
2007	2324.93
2008	2404.81
2009	2507.15
2010	2591.04
2011	2689.59
2012	2795.03
2013	2882.14
2014	2979.08
2015	3066.77
2016	3164.52