Year	Number of
1990	33616.89
1991	35299.65
1992	37106.56
1993	39063.97
1994	41308.57
1995	43967.57
1996	46259.78
1997	48703.87
1998	51325.33
1999	54268.82
2000	57471.85
2001	60036.99
2002	62607.38
2003	65181.08
2004	68093.12
2005	71167.58
2006	73181.3
2007	75063.42
2008	76874.39
2009	78783.53
2010	80726.12
2011	82409.47
2012	84224.25
2013	86065.35
2014	88215.72
2015	90481.42
2016	92890.36