Year	Number
1987	0.8837890625
1988	1.1085136218
1989	1.3332381811
1990	1.5579627404
1991	1.7826872997
1992	2.007411859
1993	2.2321364183
1994	2.4568609776
1995	2.6815855369
1996	2.9063100962
1997	3.1310346554
1998	3.3557592147
1999	3.580483774
2000	3.8052083333
2001	4.0055338542
2002	4.205859375
2003	4.235546875
2004	4.265234375
2005	4.294921875
2006	4.294921875
2007	4.294921875
2008	4.294921875
2009	4.294921875
2010	4.294921875
2011	4.294921875
2012	4.294921875
2013	4.294921875
2014	4.294921875
2015	4.294921875
2016	4.294921875
2017	4.294921875
2018	4.294921875
2019	4.294921875
2020	4.294921875