Year	Number of
1990	1475.37
1991	1519.8
1992	1567.73
1993	1618.71
1994	1686.67
1995	1770.99
1996	1851.61
1997	1943.13
1998	2042.36
1999	2142.42
2000	2240.71
2001	2326.06
2002	2402.37
2003	2473.51
2004	2533.52
2005	2590.47
2006	2625.95
2007	2661.45
2008	2703.45
2009	2751.8
2010	2796.97
2011	2824.07
2012	2850.69
2013	2879.29
2014	2906.66
2015	2935.48
2016	2963.47