Year	Number of
1990	533.96
1991	556.29
1992	581.48
1993	609
1994	636.97
1995	662.56
1996	685.23
1997	704.9
1998	724.92
1999	746.42
2000	769.04
2001	794.94
2002	822.99
2003	849.48
2004	883.94
2005	920.27
2006	946.9
2007	970.44
2008	994.67
2009	1016.26
2010	1038.04
2011	1067.14
2012	1103.82
2013	1144.16
2014	1183.17
2015	1221.34
2016	1263.12