Year	Number of
1990	537.08
1991	546.39
1992	556.03
1993	566.47
1994	577.9
1995	590.71
1996	596.04
1997	602.64
1998	611.02
1999	619.81
2000	629.06
2001	643.96
2002	659.56
2003	677.13
2004	696.24
2005	717.38
2006	732.08
2007	748.11
2008	766.73
2009	786.77
2010	808.53
2011	842.83
2012	879.32
2013	917.73
2014	958.64
2015	1002.28
2016	1048.3