Year	Number of
1990	1846.32
1991	1873.6
1992	1899.51
1993	1940.85
1994	1949.73
1995	1970.33
1996	1998.17
1997	2023.86
1998	2060.14
1999	2101.42
2000	2137.76
2001	2201.82
2002	2253.9
2003	2331.67
2004	2410.54
2005	2500.11
2006	2574.47
2007	2653.05
2008	2736.51
2009	2830.43
2010	2935.82
2011	3028.91
2012	3130.9
2013	3236.19
2014	3348.43
2015	3466.8
2016	3579.79