Year	Number of
1990	612.64
1991	629.96
1992	652.69
1993	682.45
1994	710.98
1995	747.1
1996	763.22
1997	783.76
1998	807.04
1999	823
2000	845.71
2001	881.95
2002	917.18
2003	955.44
2004	995.2
2005	1031.85
2006	1056.07
2007	1095.41
2008	1142.61
2009	1196.7
2010	1251.12
2011	1298
2012	1345.3
2013	1395.47
2014	1451.93
2015	1516.75
2016	1587.45