Year	Number of
1990	1955.72
1991	1973.39
1992	1984.08
1993	1990.99
1994	1992.38
1995	1989.75
1996	1973.64
1997	1964.04
1998	1955.75
1999	1949
2000	1939.06
2001	1921.09
2002	1905.56
2003	1883.07
2004	1860.32
2005	1833.6
2006	1803.58
2007	1777.08
2008	1763.04
2009	1758.57
2010	1757.68
2011	1752.9
2012	1750.93
2013	1755.98
2014	1766.03
2015	1782.37
2016	1803.91