Year	Number
1996	-0.416846513748169
1998	-0.243397817015648
2000	-0.449143886566162
2002	-0.465828567743301
2003	-0.752867102622986
2004	-0.508274614810944
2005	-0.687104880809784
2006	-0.712467074394226
2007	-0.707481861114502
2008	-0.758323967456818
2009	-0.745714902877808
2010	-0.698601484298706
2011	-0.709956765174866
2012	-0.605667233467102
2013	-0.698580145835876
2014	-0.688516020774841
2015	-0.630448698997498
2016	-0.624200046062469
2017	-0.670858323574066
2018	-0.675675570964813
2019	-0.624412834644318
2020	-0.595822215080261
2021	-0.604895234107971
2022	-0.560848236083984