Year	Number of
1990	1036.78
1991	1102.27
1992	1171.76
1993	1246.48
1994	1324.96
1995	1407.88
1996	1451.4
1997	1495.78
1998	1543.62
1999	1594.01
2000	1647.83
2001	1706.63
2002	1769.36
2003	1837.7
2004	1908.43
2005	1981.35
2006	2043.69
2007	2108.21
2008	2180.58
2009	2259.05
2010	2345.38
2011	2422.99
2012	2507.85
2013	2594.92
2014	2689.35
2015	2790.77
2016	2892.24