Year	Number of
1990	436.47
1991	455.75
1992	471.08
1993	483.44
1994	503.05
1995	518.81
1996	531.97
1997	536.36
1998	541.17
1999	558.4
2000	571.92
2001	588.98
2002	605.56
2003	622.65
2004	638.23
2005	649.41
2006	671.28
2007	688.49
2008	709.61
2009	722.34
2010	734.56
2011	744.04
2012	752.9
2013	766.07
2014	774.72
2015	787.33
2016	800.6