Year	Number of
1990	1542.61
1991	1599.55
1992	1661.59
1993	1735.15
1994	1804.4
1995	1884.19
1996	1961.06
1997	2035.28
1998	2113.45
1999	2198.88
2000	2268.09
2001	2328.34
2002	2385.15
2003	2448.01
2004	2506.28
2005	2576.88
2006	2644.18
2007	2661.51
2008	2709.72
2009	2748.66
2010	2790.89
2011	2868.45
2012	2928.99
2013	2985.28
2014	3051.51
2015	3146.85
2016	3238.02