Year	Number of
1990	354.71
1991	363.51
1992	374.19
1993	388.07
1994	404.72
1995	421.1
1996	435.76
1997	451.21
1998	466.01
1999	471.55
2000	483.03
2001	475.24
2002	475.1
2003	479.11
2004	490.71
2005	507.77
2006	533.11
2007	556.57
2008	581.46
2009	610.82
2010	643.7
2011	677.84
2012	713.32
2013	752.38
2014	797.21
2015	840.28
2016	892.72