Year	Number of
1990	761.34
1991	752.09
1992	743.03
1993	735.03
1994	728.38
1995	723.7
1996	745.53
1997	769.21
1998	794.55
1999	820.76
2000	849.5
2001	856.66
2002	863.23
2003	868.98
2004	874.9
2005	881.52
2006	899
2007	917.12
2008	935.33
2009	953.22
2010	972.05
2011	1007.11
2012	1044.36
2013	1082.04
2014	1121.76
2015	1164.01
2016	1208.15