Year	0=less disclosure to 10=more disclosure
2005	5.826315789473685
2006	5.984210526315789
2007	5.984210526315789
2008	6.010526315789474
2009	6.010526315789474
2010	6.089473684210526
2011	6.1684210526315795
2012	6.352631578947369
2013	6.510526315789474
2014	6.510526315789474
2015	6.510526315789474
2016	6.510526315789474
2017	6.589473684210526
2018	6.589473684210526
2019	6.6421052631578945