Year	Number
1996	-0.663562595844269
1998	-0.834110796451569
2000	-0.989421188831329
2002	-1.12330663204193
2003	-1.05233979225159
2004	-0.981866180896759
2005	-0.963428318500519
2006	-0.971096038818359
2007	-0.964514315128326
2008	-0.910835206508636
2009	-0.857977032661438
2010	-0.830411493778229
2011	-0.800011336803436
2012	-0.810820519924164
2013	-0.766909003257751
2014	-0.604193925857544
2015	-0.644318699836731
2016	-0.690513730049133
2017	-0.669473230838776
2018	-0.602721273899078
2019	-0.56812709569931
2020	-0.428430765867233
2021	-0.575048804283142
2022	-0.590548574924469