Year	Number of
1990	2008.51
1991	2068.89
1992	2133.89
1993	2199.78
1994	2268.71
1995	2341.04
1996	2363.2
1997	2384.47
1998	2404.53
1999	2427.29
2000	2453.83
2001	2547.93
2002	2650.36
2003	2763
2004	2881.7
2005	3006.56
2006	3091.13
2007	3177.83
2008	3272.59
2009	3371.52
2010	3475.73
2011	3592.26
2012	3713.35
2013	3838.06
2014	3964.55
2015	4092.07
2016	4219.67