Year	Number of
1990	1213.05
1991	1264.07
1992	1323.23
1993	1386.92
1994	1451.27
1995	1515.21
1996	1557.9
1997	1598.76
1998	1638.89
1999	1681.05
2000	1727.9
2001	1792.4
2002	1862.99
2003	1939.29
2004	2020.92
2005	2108.73
2006	2202
2007	2301.96
2008	2410.2
2009	2524.28
2010	2644.81
2011	2771.36
2012	2904.91
2013	3046.24
2014	3198.36
2015	3363.11
2016	3537.32