Year	Number of
1990	841.14
1991	838.63
1992	837.78
1993	836.03
1994	842.41
1995	853.08
1996	868.41
1997	891.11
1998	917.81
1999	940.44
2000	958.49
2001	971.08
2002	990.2
2003	1011.08
2004	1027.03
2005	1043.29
2006	1058.6
2007	1077.14
2008	1094.75
2009	1107.73
2010	1119.55
2011	1128.97
2012	1145.36
2013	1160.25
2014	1178.16
2015	1197.91
2016	1221.85