Year	Number of
1990	1015.05
1991	1029.93
1992	1053.56
1993	1068.6
1994	1081.33
1995	1098.5
1996	1102.29
1997	1083.55
1998	1076.81
1999	1059.78
2000	1023.78
2001	975.43
2002	932.67
2003	899.02
2004	876.6
2005	846.11
2006	817.9
2007	796.82
2008	779.63
2009	766.65
2010	766.84
2011	770.42
2012	774.65
2013	781.59
2014	796.67
2015	820.35
2016	843.5