Year	Number of
1990	573.04
1991	599.63
1992	627.28
1993	656.27
1994	687.99
1995	723.36
1996	756.93
1997	794.16
1998	834.49
1999	877
2000	921.65
2001	957.97
2002	994.07
2003	1030.62
2004	1068.17
2005	1107.71
2006	1141.49
2007	1176.11
2008	1213.61
2009	1252.97
2010	1295.02
2011	1336.28
2012	1382.12
2013	1430.87
2014	1481.53
2015	1533.62
2016	1586.78