Year	Number
1996	-0.702762424945831
1998	-0.803637623786926
2000	-0.810984015464783
2002	-0.840931594371796
2003	-0.734542429447174
2004	-0.565569579601288
2005	-0.607605695724487
2006	-0.228577166795731
2007	-0.335751265287399
2008	-0.416348159313202
2009	-0.447849065065384
2010	-0.542279362678528
2011	-0.603359639644623
2012	-0.764619529247284
2013	-0.780951321125031
2014	-0.761074304580688
2015	-0.709463357925415
2016	-0.531090378761292
2017	-0.487049072980881
2018	-0.47571074962616
2019	-0.423007667064667
2020	-0.408919662237167
2021	-0.39690038561821
2022	-0.341099858283997