Year	Number of
1990	1122.48
1991	1119.25
1992	1102.92
1993	1118.68
1994	1098.68
1995	1066.78
1996	1022.85
1997	972.85
1998	950.05
1999	936.02
2000	903.74
2001	900.18
2002	897.78
2003	891.16
2004	889.5
2005	884.08
2006	880.02
2007	877.51
2008	876.42
2009	877.76
2010	879.63
2011	892.2
2012	907.46
2013	923.74
2014	939.28
2015	955.04
2016	965.66