Year	Number of
1990	525.69
1991	534.42
1992	548.66
1993	581.38
1994	607.3
1995	638.02
1996	656.34
1997	669.03
1998	680.22
1999	702.54
2000	723.71
2001	758.85
2002	795.97
2003	830.39
2004	877.5
2005	923.95
2006	956.65
2007	990.68
2008	1026.88
2009	1081.3
2010	1145.09
2011	1202.27
2012	1267.64
2013	1321.27
2014	1358.64
2015	1406.78
2016	1463.83