Year	Number
1996	0.0414915084838867
1998	0.0254939887672663
2000	-0.0879821851849556
2002	-0.329601347446442
2003	-0.37824472784996
2004	-0.0212552063167095
2005	-0.496897280216217
2006	-0.303130626678467
2007	-0.116835959255695
2008	-0.440319508314133
2009	-0.108424991369247
2010	-0.113489478826523
2011	-0.453298777341843
2012	-0.257587939500809
2013	-0.258733332157135
2014	-0.283548146486282
2015	-0.485357046127319
2016	-0.183015376329422
2017	-0.0616638585925102
2018	-0.226567178964615
2019	-0.35441330075264
2020	-0.578033030033112
2021	-0.761419832706451
2022	-0.702682197093964