Year	Number of
1990	87.04
1991	89.12
1992	92.02
1993	94.74
1994	98.65
1995	102.75
1996	106.91
1997	108.75
1998	112.02
1999	115.12
2000	118.71
2001	122.29
2002	124.43
2003	127.33
2004	132.34
2005	135.89
2006	139.45
2007	143.47
2008	148.75
2009	154.64
2010	160.7
2011	166.53
2012	173.63
2013	181.26
2014	189.13
2015	197.79
2016	205.01