Year	Number of
1990	493.42
1991	526.24
1992	561.8
1993	599.62
1994	641.14
1995	687.35
1996	722.42
1997	760.99
1998	801.31
1999	842.97
2000	885.97
2001	918.97
2002	952.99
2003	986.13
2004	1021
2005	1058.17
2006	1088.67
2007	1120.24
2008	1154.03
2009	1190.11
2010	1228.97
2011	1237.66
2012	1247.95
2013	1258.97
2014	1271.32
2015	1284.96
2016	1302.35