Year	number
2003	7.75
2004	7.2
2005	7.2
2006	7.2
2007	7
2008	7
2009	7.2
2010	7.2
2011	7.2
2012	7.2
2013	8.93375
2014	8.9925
2015	8.7425
2016	8.6175
2017	8.55875
2018	7.875
2019	7.25