Year	Number of
1990	1984.04
1991	2024.09
1992	2066.36
1993	2115.96
1994	2170.03
1995	2229.78
1996	2287.36
1997	2348.52
1998	2420.5
1999	2496.31
2000	2575.79
2001	2642.48
2002	2714.97
2003	2802.1
2004	2890.76
2005	2981.42
2006	3080.5
2007	3181.75
2008	3292.98
2009	3409.76
2010	3533.69
2011	3682.12
2012	3836.83
2013	3997.59
2014	4163.59
2015	4336.09
2016	4512.03