Year	Number of
1990	1681.35
1991	1849.67
1992	2036.75
1993	2234.87
1994	2452.92
1995	2691.12
1996	2931.46
1997	3196.06
1998	3491.4
1999	3812.15
2000	4159.5
2001	4420.8
2002	4699.9
2003	5000.25
2004	5324.26
2005	5665.67
2006	5952.94
2007	6264.44
2008	6587.52
2009	6934
2010	7299.02
2011	7617.02
2012	7954.98
2013	8311.96
2014	8688.97
2015	9080.63
2016	9485.47