Year	Number of
1990	1361.32
1991	1384.76
1992	1388.33
1993	1379.45
1994	1375.47
1995	1372.34
1996	1375.45
1997	1384.08
1998	1411.78
1999	1432.01
2000	1472.1
2001	1498.23
2002	1544.85
2003	1595.85
2004	1628.3
2005	1660.05
2006	1696.09
2007	1724.28
2008	1743.68
2009	1757.5
2010	1781.91
2011	1807.04
2012	1820.08
2013	1844.76
2014	1884.49
2015	1899.83
2016	1910.02