Year	Number of
1990	945.97
1991	990.6
1992	1035.14
1993	1078.48
1994	1122.47
1995	1166.94
1996	1158.08
1997	1143.61
1998	1124.41
1999	1105.63
2000	1089.56
2001	1119.02
2002	1153.73
2003	1196.85
2004	1238.4
2005	1277.15
2006	1288.92
2007	1296.81
2008	1303.28
2009	1314.36
2010	1333.45
2011	1348.77
2012	1369.84
2013	1388.33
2014	1400.11
2015	1404.64
2016	1410.57