Year	0=less disclosure to 10=more disclosure
2005	3.730769230769231
2006	3.730769230769231
2007	3.730769230769231
2008	3.6923076923076925
2009	3.8846153846153846
2010	3.9615384615384617
2011	4.115384615384615
2012	4.230769230769231
2013	4.346153846153846
2014	4.423076923076923
2015	4.538461538461538
2016	4.6923076923076925
2017	4.730769230769231
2018	4.884615384615385
2019	4.884615384615385