Year	Number of
1990	961.37
1991	957.73
1992	944.33
1993	971.96
1994	1000.66
1995	1008.31
1996	1027.23
1997	1047.78
1998	1041.55
1999	1052.29
2000	1056.06
2001	1087.87
2002	1102.91
2003	1120.68
2004	1126.94
2005	1130.9
2006	1169.32
2007	1189.9
2008	1234.66
2009	1244.18
2010	1277.78
2011	1311.39
2012	1325.84
2013	1324.68
2014	1327.17
2015	1348.25
2016	1371.88