Year	Number of
1990	811.98
1991	836.13
1992	860.62
1993	883.31
1994	908.96
1995	938.87
1996	964.91
1997	993.72
1998	1024.54
1999	1053.89
2000	1081.38
2001	1093.58
2002	1105.92
2003	1124.81
2004	1145.44
2005	1168.14
2006	1161.22
2007	1155.04
2008	1149.13
2009	1143.97
2010	1139.5
2011	1136.42
2012	1134.27
2013	1131.55
2014	1129.38
2015	1127.88
2016	1125.02