Year	Number of
1990	617.66
1991	642.04
1992	657.79
1993	675.2
1994	692
1995	709.04
1996	726.66
1997	747.19
1998	766.56
1999	791.44
2000	815.72
2001	833.12
2002	852.76
2003	863.12
2004	889.64
2005	915.45
2006	944.86
2007	985.26
2008	1029.87
2009	1076.09
2010	1133.53
2011	1182.67
2012	1254.07
2013	1321.31
2014	1364.25
2015	1379.44
2016	1438.35