Year	Number of
1990	432.71
1991	452.95
1992	477.34
1993	504.17
1994	530.6
1995	560.47
1996	585.77
1997	611.7
1998	637.84
1999	656.46
2000	673.78
2001	688.64
2002	701.65
2003	714.38
2004	728.85
2005	738.27
2006	754.96
2007	768.69
2008	787.19
2009	807.31
2010	828.19
2011	853.24
2012	881.03
2013	909.52
2014	936.21
2015	962.41
2016	990.25