Year	Number of
1990	819.08
1991	826.14
1992	846.94
1993	860.59
1994	877.18
1995	898.74
1996	909.55
1997	934.69
1998	960.36
1999	986.48
2000	1012.77
2001	1027.22
2002	1057.14
2003	1082.29
2004	1119.96
2005	1151.11
2006	1184.28
2007	1212.6
2008	1242.98
2009	1287.45
2010	1327.68
2011	1365.49
2012	1405.97
2013	1444.14
2014	1484.14
2015	1526.58
2016	1570.48