Year	Number
1996	-1.2748167514801
1998	-0.91581529378891
2000	-1.06467461585999
2002	-0.670977175235748
2003	-0.489668667316437
2004	-0.67443460226059
2005	-1.01584625244141
2006	-0.896951019763947
2007	-0.891591012477875
2008	-0.865504682064056
2009	-1.01221060752869
2010	-1.07546448707581
2011	-1.21547913551331
2012	-1.28747808933258
2013	-1.25735402107239
2014	-1.26760983467102
2015	-1.45967710018158
2016	-1.26049017906189
2017	-0.622010767459869
2018	-0.21528185904026
2019	-0.249232843518257
2020	-0.199700385332108
2021	-0.105402499437332
2022	-0.0414298065006733