Year	Number
1996	-0.334019482135773
1998	-0.483754485845566
2000	-0.413114339113235
2002	-0.317013323307037
2003	-0.366780430078506
2004	-0.444224864244461
2005	-0.430345922708511
2006	-0.207338288426399
2007	-0.206985205411911
2008	-0.161100178956985
2009	-0.300323873758316
2010	-0.243015319108963
2011	-0.170420810580254
2012	-0.132826566696167
2013	-0.106042101979256
2014	-0.109430871903896
2015	-0.0665439739823341
2016	-0.300620377063751
2017	-0.335553705692291
2018	-0.336164176464081
2019	-0.309619903564453
2020	-0.428918957710266
2021	-0.369447886943817
2022	-0.089141272008419