Year	Number of
1990	1415.03
1991	1549.3
1992	1680.76
1993	1807.72
1994	1920.36
1995	1998.69
1996	2077.72
1997	2169.99
1998	2295.27
1999	2429.46
2000	2530.89
2001	2638.2
2002	2792.15
2003	2922.92
2004	3052.43
2005	3165.42
2006	3275.65
2007	3370.29
2008	3494.86
2009	3619.41
2010	3746.18
2011	3810.66
2012	3924.81
2013	4061.32
2014	4204
2015	4366.55
2016	4536.08