Year	Number of
1990	185577.99
1991	189809.1
1992	194539.13
1993	199502.97
1994	204380.83
1995	209600.9
1996	210834.16
1997	212409.26
1998	214200.12
1999	215865.03
2000	217599.36
2001	217706.69
2002	218074.08
2003	218556.92
2004	219141.21
2005	219927.14
2006	222012.16
2007	224381.39
2008	226858.31
2009	229503.16
2010	232261.69
2011	236774.11
2012	241430.93
2013	245998.39
2014	250188.41
2015	254840.01
2016	259633.55