Year	Number of
1990	583.35
1991	576.11
1992	575.2
1993	573.57
1994	576.59
1995	583.67
1996	592.5
1997	596.02
1998	621.75
1999	639.42
2000	655.55
2001	648.47
2002	651.15
2003	675.19
2004	700.52
2005	726.3
2006	752.15
2007	776.91
2008	801.73
2009	828.13
2010	856.06
2011	886.9
2012	930.49
2013	984.52
2014	1039.81
2015	1092.71
2016	1140.57