Year	Number of
1990	1222.21
1991	1246.38
1992	1276.19
1993	1319.79
1994	1377.88
1995	1427.63
1996	1450.95
1997	1484.44
1998	1516.68
1999	1553.59
2000	1582.52
2001	1593.93
2002	1599.55
2003	1612.43
2004	1646.59
2005	1695.66
2006	1744.67
2007	1774.3
2008	1792.27
2009	1830.13
2010	1904.21
2011	1962.95
2012	2024.46
2013	2089.08
2014	2181.37
2015	2274.33
2016	2363.08