Year	Number of
1990	565.52
1991	582.17
1992	582.7
1993	588.23
1994	601.71
1995	609.15
1996	616.08
1997	607.87
1998	612.89
1999	621.65
2000	622.44
2001	638.14
2002	642.77
2003	648.03
2004	658.39
2005	658.13
2006	667.67
2007	673.58
2008	677.31
2009	677.9
2010	680.42
2011	687.31
2012	697.33
2013	699.15
2014	711.55
2015	728.77
2016	745.5