Year	Number of
1990	951.83
1991	957.56
1992	963.91
1993	964.5
1994	982.45
1995	985.01
1996	988.14
1997	1057.12
1998	1166.46
1999	1327.68
2000	1489.72
2001	1650.34
2002	1811.67
2003	1968.25
2004	2091.95
2005	2183.62
2006	2099.82
2007	2063.08
2008	2066.05
2009	2080.19
2010	2100.63
2011	2102.18
2012	2122.64
2013	2168.41
2014	2212.38
2015	2253.96
2016	2306.39