Year	Number
1996	-0.321172207593918
1998	-0.391127526760101
2000	-0.470682233572006
2002	-0.526887536048889
2003	-0.662809371948242
2004	-0.780080676078796
2005	-0.827001750469208
2006	-0.950213253498077
2007	-0.86647754907608
2008	-0.845180630683899
2009	-0.971218228340149
2010	-0.865145206451416
2011	-0.905199348926544
2012	-0.863606691360474
2013	-0.863369941711426
2014	-0.866108179092407
2015	-0.894542098045349
2016	-0.968354880809784
2017	-1.06027472019196
2018	-0.961687982082367
2019	-1.04343354701996
2020	-0.980097234249115
2021	-0.893327057361603
2022	-0.879000067710876