Year	Number of
1990	1103.08
1991	1155.12
1992	1211.81
1993	1273.74
1994	1328.65
1995	1408.92
1996	1496.42
1997	1569.1
1998	1601.83
1999	1648.47
2000	1736.2
2001	1770.13
2002	1869
2003	1959.83
2004	2010.5
2005	2038.13
2006	2058.31
2007	2069.87
2008	2097.75
2009	2105.78
2010	2154.99
2011	2227.78
2012	2268.44
2013	2335.16
2014	2423.99
2015	2523
2016	2623.28