Year	0=less disclosure to 10=more disclosure
2005	5.1
2006	5.1
2007	5.1
2008	5.1
2009	5.2
2010	5.2
2011	5.5
2012	5.85
2013	6.05
2014	6
2015	6
2016	6.1
2017	6.1
2018	6.15
2019	6.25