Year	Number of
1990	1182.09
1991	1196.33
1992	1186.33
1993	1181.3
1994	1174.88
1995	1203.13
1996	1176.61
1997	1147.12
1998	1135.8
1999	1123.77
2000	1110.06
2001	1113.15
2002	1094.32
2003	1090.99
2004	1067.39
2005	1063.68
2006	1057.86
2007	1054.51
2008	1048.65
2009	1048.04
2010	1051.15
2011	1053.12
2012	1050.35
2013	1049.5
2014	1055.86
2015	1067.22
2016	1079.12