Year	Number of
1990	1133.17
1991	1148.69
1992	1184.19
1993	1238.57
1994	1282.93
1995	1341.42
1996	1395.39
1997	1432.21
1998	1449.38
1999	1460.8
2000	1500.31
2001	1546.17
2002	1584.78
2003	1631.44
2004	1640.07
2005	1710.33
2006	1752.74
2007	1796.83
2008	1881.96
2009	1957.19
2010	1999.69
2011	1967.08
2012	2015.78
2013	2072.37
2014	2102.68
2015	2085.3
2016	2042.63