Year	Number of
1990	868.8
1991	909.62
1992	950.44
1993	987.69
1994	1030.62
1995	1081.21
1996	1123.44
1997	1148.63
1998	1185.13
1999	1229.03
2000	1266.66
2001	1321.4
2002	1367.03
2003	1439.02
2004	1491.24
2005	1551.71
2006	1617.26
2007	1684.77
2008	1778.19
2009	1865.03
2010	1951.41
2011	2047.65
2012	2150.96
2013	2241.49
2014	2342.39
2015	2452.49
2016	2583.57