Year	Number of
1990	1124.18
1991	1180.04
1992	1237.36
1993	1304.51
1994	1334.83
1995	1385.3
1996	1382.44
1997	1408.3
1998	1430
1999	1423.8
2000	1385.76
2001	1397.62
2002	1371.26
2003	1327.44
2004	1305.11
2005	1279.6
2006	1234.9
2007	1195.51
2008	1176.98
2009	1058.99
2010	1210.62
2011	1251.88
2012	1200.05
2013	1223.07
2014	1189.1
2015	1171.19
2016	1171.01