Year	Number of
1990	495.77
1991	515.11
1992	535.55
1993	557.13
1994	580.77
1995	607.36
1996	630.86
1997	657.03
1998	686.21
1999	718
2000	752.71
2001	775.86
2002	799.71
2003	826.04
2004	852.42
2005	879.42
2006	915.76
2007	953.94
2008	995.69
2009	1038.79
2010	1083.58
2011	1126.6
2012	1170.31
2013	1215.91
2014	1264.02
2015	1315.33
2016	1366.24