Year	0=less disclosure to 10=more disclosure
2005	3.5789473684210527
2006	3.5789473684210527
2007	3.5789473684210527
2008	3.5789473684210527
2009	3.5789473684210527
2010	3.6315789473684212
2011	3.763157894736842
2012	3.763157894736842
2013	3.8157894736842106
2014	3.8421052631578947
2015	3.8421052631578947
2016	3.8421052631578947
2017	3.9210526315789473
2018	3.973684210526316
2019	4