Year	Number of
1990	1054.77
1991	1070.35
1992	1074.18
1993	1079.52
1994	1065.94
1995	1069.73
1996	1066.25
1997	1064.78
1998	1079.91
1999	1077.84
2000	1081.04
2001	1067.98
2002	1062.98
2003	1045.03
2004	1037.15
2005	1027.72
2006	1035
2007	1054.21
2008	1069.48
2009	1101.95
2010	1083.65
2011	1091.54
2012	1079.72
2013	1079.25
2014	1084.56
2015	1108.89
2016	1132.37