Year	Number of
1990	618.54
1991	639.88
1992	661.17
1993	682.49
1994	709.41
1995	739.6
1996	765.43
1997	794.34
1998	826.68
1999	865.02
2000	902.74
2001	937.03
2002	969.12
2003	1000.89
2004	1030.9
2005	1060.48
2006	1083.35
2007	1106.67
2008	1133.72
2009	1163.12
2010	1192.65
2011	1216.56
2012	1239.54
2013	1264.23
2014	1289.61
2015	1315.37
2016	1340.53