Year	Number of
1990	1189.02
1991	1254.03
1992	1323.09
1993	1397.36
1994	1477.68
1995	1564.96
1996	1634.7
1997	1709.9
1998	1792.99
1999	1880.17
2000	1971.46
2001	2055.56
2002	2143.91
2003	2242.02
2004	2346.81
2005	2458.93
2006	2585.4
2007	2721.71
2008	2872.07
2009	3031.67
2010	3200.25
2011	3341.49
2012	3489.79
2013	3647
2014	3813.62
2015	3990.4
2016	4172.98