Year	Number
1996	-0.956391930580139
1998	-0.784960150718689
2000	-0.564015805721283
2002	-0.677264809608459
2003	-0.429470658302307
2004	-0.359356343746185
2005	-0.182024568319321
2006	-0.244705229997635
2007	-0.32610896229744
2008	-0.552110910415649
2009	-0.474782139062881
2010	-0.736971437931061
2011	-0.661687970161438
2012	-0.588517427444458
2013	-0.53223729133606
2014	-1.05925238132477
2015	-0.989914000034332
2016	-1.06121301651001
2017	-1.09150469303131
2018	-1.40175902843475
2019	-1.56176483631134
2020	-1.51364362239838
2021	-1.39403569698334
2022	-1.35294902324677