Year	Number of
1990	4538.94
1991	4665.69
1992	4778.78
1993	4875.09
1994	4956.37
1995	5051.87
1996	5150.57
1997	5239.06
1998	5341.12
1999	5448.04
2000	5522.12
2001	5550.09
2002	5577.93
2003	5698.87
2004	5821.07
2005	5918.77
2006	5926.67
2007	5964.1
2008	6053.49
2009	6076.42
2010	6070.21
2011	6123.43
2012	6127.09
2013	6055.65
2014	6008.41
2015	5990.82
2016	5991.17