Year	Number of
1990	541.38
1991	557.27
1992	575.35
1993	594.84
1994	614.49
1995	634.06
1996	643.34
1997	651.74
1998	659.89
1999	669.13
2000	680.31
2001	691.19
2002	704.03
2003	719.25
2004	735.9
2005	754.07
2006	773.25
2007	793.88
2008	817.22
2009	842.1
2010	868.81
2011	890.71
2012	914.29
2013	939.12
2014	965.74
2015	994.29
2016	1024.33