Year	Number of
1990	801.5
1991	814.97
1992	826.19
1993	840.08
1994	854.87
1995	868.46
1996	893.36
1997	913.49
1998	925.75
1999	947.86
2000	970.28
2001	985.21
2002	1016.56
2003	1045.72
2004	1078.28
2005	1105.92
2006	1137.33
2007	1175.71
2008	1212.86
2009	1247.78
2010	1276.85
2011	1310.87
2012	1347.48
2013	1366.91
2014	1394.32
2015	1404.06
2016	1425.7