Year	Number of
1990	501.34
1991	510.26
1992	523.98
1993	553.03
1994	574.97
1995	601.52
1996	616.49
1997	626.21
1998	635.6
1999	653.78
2000	675.59
2001	707.45
2002	740.96
2003	772.49
2004	815.16
2005	858.96
2006	893.35
2007	927.1
2008	965.26
2009	1015.83
2010	1073.1
2011	1131.49
2012	1195.01
2013	1252.22
2014	1297.58
2015	1354.77
2016	1417.53