Year	Number of
1990	690.43
1991	712.37
1992	746.88
1993	779.49
1994	824.97
1995	866
1996	893.19
1997	932.81
1998	979.19
1999	987.64
2000	984.43
2001	966.99
2002	954.9
2003	985.33
2004	997.4
2005	1015.85
2006	1042.53
2007	1075.65
2008	1108.02
2009	1149.38
2010	1182.18
2011	1229.34
2012	1283.04
2013	1363.14
2014	1434.07
2015	1507.34
2016	1564.61