Year	0=less disclosure to 10=more disclosure
2005	4.25984251968504
2006	4.283464566929134
2007	4.3700787401574805
2008	4.488188976377953
2009	4.645669291338582
2010	4.700787401574803
2011	4.7795275590551185
2012	4.881889763779528
2013	4.929133858267717
2014	5.173228346456693
2015	5.31496062992126
2016	5.417322834645669
2017	5.488188976377953
2018	5.6141732283464565
2019	5.724409448818897