Year	Number of
1990	888.64
1991	919.96
1992	950.52
1993	982.15
1994	1013.9
1995	1046.84
1996	1086.35
1997	1126.75
1998	1169.17
1999	1213.57
2000	1260.39
2001	1310.68
2002	1362.28
2003	1416.03
2004	1470.2
2005	1525.85
2006	1586.98
2007	1650.46
2008	1719.55
2009	1795.61
2010	1880.29
2011	1972.6
2012	2073.26
2013	2176.07
2014	2290.51
2015	2418.63
2016	2572.14