Year	Number of
1990	561.14
1991	580.86
1992	603.02
1993	626.78
1994	652.74
1995	680.24
1996	707.55
1997	748.15
1998	765.64
1999	801.54
2000	855.62
2001	870.01
2002	927.35
2003	966.47
2004	1004.58
2005	1037.69
2006	1075.3
2007	1110.1
2008	1182.11
2009	1188.79
2010	1244.71
2011	1254.55
2012	1271.64
2013	1294.35
2014	1326.55
2015	1364.5
2016	1406.45