Year	Number of
1990	4653.86
1991	4790.94
1992	4944.83
1993	5149.66
1994	5328.73
1995	5496.84
1996	5670.36
1997	5798.39
1998	5945.41
1999	5974.15
2000	5963
2001	6033.46
2002	6101.07
2003	6141.65
2004	6159.92
2005	6165.96
2006	6183.92
2007	6257.29
2008	6299.42
2009	6358.89
2010	6454.9
2011	6583.13
2012	6704.84
2013	6741.01
2014	6852.98
2015	7115.65
2016	7355.18