Year	Number of
1990	594.96
1991	608.26
1992	625.93
1993	646.2
1994	666.85
1995	688
1996	712.29
1997	736.55
1998	760.28
1999	786.6
2000	813.28
2001	846.84
2002	881.81
2003	919.61
2004	960.35
2005	1006.03
2006	1049.82
2007	1097.43
2008	1153.28
2009	1212.86
2010	1277.76
2011	1310.98
2012	1348.85
2013	1381.18
2014	1422.81
2015	1469.41
2016	1512.33