Year	Number of
1990	738.62
1991	756.09
1992	798.11
1993	853.66
1994	954.88
1995	1008.19
1996	1040.21
1997	1057.52
1998	1077.79
1999	1084.06
2000	1071.37
2001	1082.71
2002	1088.96
2003	1092.57
2004	1096.41
2005	1096.07
2006	1093.11
2007	1081.98
2008	1086.59
2009	1089.66
2010	1085.83
2011	1080.03
2012	1087.06
2013	1094.99
2014	1105.35
2015	1119.77
2016	1140.57