Year	Number
1996	-0.0584283582866192
1998	-0.0855698809027672
2000	-0.22792449593544
2002	-0.43222051858902
2003	-0.551806807518005
2004	-0.672145783901215
2005	-0.569969236850739
2006	-0.451236516237259
2007	-0.573499917984009
2008	-0.442116975784302
2009	-0.289043039083481
2010	-0.268090695142746
2011	-0.315068930387497
2012	-0.401940673589706
2013	-0.405386388301849
2014	-0.473918706178665
2015	-0.512037396430969
2016	-0.583839416503906
2017	-0.615030944347382
2018	-0.742027103900909
2019	-0.741844892501831
2020	-0.769557952880859
2021	-0.774542570114136
2022	-0.752661883831024