Year	Number of
1990	2070.1
1991	2082.63
1992	2093.48
1993	2117.26
1994	2112.06
1995	2121.13
1996	2129.15
1997	2136.99
1998	2158.24
1999	2182.01
2000	2203.66
2001	2252.45
2002	2292.35
2003	2360.02
2004	2429.65
2005	2510.43
2006	2576.33
2007	2648.07
2008	2726.63
2009	2814.28
2010	2912.93
2011	2995.6
2012	3088.26
2013	3185.92
2014	3289.51
2015	3398.06
2016	3502.57