Year	Number of
1990	779.55
1991	775.93
1992	777.69
1993	777.45
1994	790.9
1995	796.76
1996	804.52
1997	827.46
1998	840.87
1999	859.5
2000	874.18
2001	887.03
2002	898.94
2003	900.01
2004	876.12
2005	869.08
2006	903.63
2007	916.79
2008	926.04
2009	954.9
2010	984.89
2011	1001.67
2012	1014.45
2013	1032.38
2014	1046.89
2015	1059.73
2016	1075.46