Year	Number of
1990	603.08
1991	617.3
1992	634.09
1993	651.8
1994	670.24
1995	689.16
1996	707.83
1997	726.49
1998	746.78
1999	767.99
2000	790.65
2001	815.56
2002	842.27
2003	872.03
2004	903.72
2005	937.79
2006	968.01
2007	999.64
2008	1034.2
2009	1072.39
2010	1115.07
2011	1156.23
2012	1201.43
2013	1249.51
2014	1303.5
2015	1364.13
2016	1432.03