Year	Number of
1990	670.27
1991	699.57
1992	731.85
1993	766.57
1994	802.8
1995	840.39
1996	870.2
1997	900.78
1998	932.72
1999	965.99
2000	1001.1
2001	1019.27
2002	1037.82
2003	1057.11
2004	1078.58
2005	1103.24
2006	1140.64
2007	1182.4
2008	1228.94
2009	1276.95
2010	1326.19
2011	1393.72
2012	1464.86
2013	1540.28
2014	1620.75
2015	1706.94
2016	1797.16