Year	Number of
1990	1001.28
1991	1041.41
1992	1087.87
1993	1136.38
1994	1153.91
1995	1133.14
1996	1097.87
1997	1085.12
1998	1148.79
1999	1162.13
2000	1215.89
2001	1239.33
2002	1252.29
2003	1308.84
2004	1285.68
2005	1307.47
2006	1402.48
2007	1499.03
2008	1564.76
2009	1618.58
2010	1605.12
2011	1678.71
2012	1799.77
2013	1869.2
2014	2016.05
2015	2155.62
2016	2286.71