Year	Number of
1990	748.27
1991	788.95
1992	837.24
1993	884.58
1994	924.95
1995	965.64
1996	979.1
1997	1004.07
1998	1033.69
1999	1055.9
2000	1081.83
2001	1100.41
2002	1123.42
2003	1142.75
2004	1168.18
2005	1193.99
2006	1226.68
2007	1238.76
2008	1253.45
2009	1265.2
2010	1298.65
2011	1307.95
2012	1317.34
2013	1353.14
2014	1380.2
2015	1401.6
2016	1430.69