Year	Number of
1990	7871.42
1991	7883.11
1992	7866.58
1993	7877.65
1994	7732.81
1995	7650.81
1996	7631.13
1997	7563.86
1998	7449.7
1999	7451.95
2000	7367.48
2001	7383.17
2002	7358.55
2003	7254.59
2004	7135.25
2005	6974.49
2006	6923.51
2007	6916.79
2008	6931.34
2009	6981.95
2010	6977.73
2011	6951.12
2012	6996.08
2013	7040.91
2014	7015.89
2015	7056.66
2016	7211.45