Year	Number of
1990	545.55
1991	560.69
1992	578.36
1993	597.42
1994	616.62
1995	635.92
1996	642.67
1997	648.71
1998	654.48
1999	661.28
2000	670.34
2001	676.13
2002	684.15
2003	694.27
2004	705.63
2005	718.7
2006	734.16
2007	750.54
2008	769.67
2009	790.08
2010	812.42
2011	828.17
2012	845.68
2013	864.16
2014	884.04
2015	905.39
2016	927.49