Year	Number
1996	-0.74391508102417
1998	-0.611828744411469
2000	-0.579896092414856
2002	-0.685433745384216
2003	-0.761468172073364
2004	-0.716462850570679
2005	-0.680190563201904
2006	-0.660407066345215
2007	-0.553879499435425
2008	-0.622831583023071
2009	-0.674577832221985
2010	-0.636895477771759
2011	-0.520890951156616
2012	-0.691542148590088
2013	-0.723534107208252
2014	-0.811582028865814
2015	-0.858826220035553
2016	-0.76320344209671
2017	-0.531442284584045
2018	-0.618283271789551
2019	-0.619096457958221
2020	-0.645444571971893
2021	-0.818129122257233
2022	-0.866467356681824