Year	Number of
1990	1007
1991	1046.13
1992	1088.52
1993	1134.62
1994	1182.62
1995	1232.64
1996	1285.84
1997	1340.45
1998	1397.92
1999	1457.99
2000	1521.58
2001	1616.68
2002	1716.77
2003	1832.53
2004	1951.26
2005	2072.96
2006	2162.83
2007	2257.57
2008	2367.14
2009	2485.05
2010	2612.07
2011	2734.23
2012	2866.41
2013	2991.41
2014	3127.17
2015	3275.31
2016	3438.89