Year	Number of
1990	966.73
1991	999.03
1992	1024.26
1993	1059.54
1994	1076.29
1995	1055.01
1996	1011.16
1997	985.63
1998	1040.2
1999	1053.37
2000	1104
2001	1120.6
2002	1128.18
2003	1183.49
2004	1143.11
2005	1141.71
2006	1208.95
2007	1267.67
2008	1290.41
2009	1302.25
2010	1251
2011	1278.07
2012	1334.34
2013	1331.77
2014	1389.9
2015	1446.65
2016	1504.71