Year	Number of
1990	1292.85
1991	1348.01
1992	1409.23
1993	1470.35
1994	1538.43
1995	1614.31
1996	1689.09
1997	1769.73
1998	1852.21
1999	1940.11
2000	2034.02
2001	2086.2
2002	2138.39
2003	2210.43
2004	2277.12
2005	2338.59
2006	2373.9
2007	2405.99
2008	2452.64
2009	2501.11
2010	2551.84
2011	2590.05
2012	2630.64
2013	2669.8
2014	2709.59
2015	2749.53
2016	2772.56