Year	Number of
1990	3570.37
1991	3681.87
1992	3802.89
1993	3933.7
1994	4072.93
1995	4225.65
1996	4447.41
1997	4687.66
1998	4947.78
1999	5226.69
2000	5531.73
2001	5754.89
2002	5997.47
2003	6258.8
2004	6535.59
2005	6834.56
2006	7025.74
2007	7220.69
2008	7439.19
2009	7669.03
2010	7918.07
2011	8128.98
2012	8354.71
2013	8594.37
2014	8847.8
2015	9113.11
2016	9397.39