Year	Number
1996	-0.85694420337677
1998	-0.866168260574341
2000	-0.830889880657196
2002	-0.660021722316742
2003	-0.737127959728241
2004	-0.619750618934631
2005	-0.684203922748566
2006	-0.837902724742889
2007	-0.769333958625793
2008	-0.666637182235718
2009	-0.533482134342194
2010	-0.540784418582916
2011	-0.537248194217682
2012	-0.678762555122375
2013	-0.639010667800903
2014	-0.756130754947662
2015	-0.780903100967407
2016	-0.790915012359619
2017	-0.787171602249146
2018	-0.821694731712341
2019	-0.915391564369202
2020	-1.13400268554688
2021	-1.19213712215424
2022	-1.20975136756897