Year	Number of
1990	7866.18
1991	8054.14
1992	8233.25
1993	8475.49
1994	8692.12
1995	8838.96
1996	9096.23
1997	9156.39
1998	9342.25
1999	9386.74
2000	9494.43
2001	9550.92
2002	9735.64
2003	10068.48
2004	10008.23
2005	10279.54
2006	10599.52
2007	10769.83
2008	10847.38
2009	11015.91
2010	11088.18
2011	11123.07
2012	11179.03
2013	11028.94
2014	11191.01
2015	11383.15
2016	11590.17