Year	Number of
1990	503.48
1991	530.47
1992	561.75
1993	596.83
1994	634.68
1995	675.87
1996	705.43
1997	737.78
1998	770.18
1999	803.98
2000	840.12
2001	883.02
2002	928.43
2003	976.97
2004	1029.84
2005	1088.92
2006	1112.37
2007	1137.68
2008	1166.66
2009	1197.68
2010	1231.43
2011	1312.51
2012	1402.45
2013	1500.7
2014	1608.43
2015	1726.6
2016	1854.98