Year	Number
1996	0.73292738199234
1998	0.638808608055115
2000	0.550269722938538
2002	0.332901507616043
2003	0.275540828704834
2004	0.397753119468689
2005	0.483857184648514
2006	0.37827143073082
2007	0.197672486305237
2008	0.153828725218773
2009	0.125426694750786
2010	0.0653930976986885
2011	-0.00423370534554124
2012	-0.184170603752136
2013	-0.137831538915634
2014	-0.124875418841839
2015	-0.0705104395747185
2016	0.0174094624817371
2017	-0.127464935183525
2018	-0.136328086256981
2019	-0.0310517251491547
2020	-0.0589598156511784
2021	-0.034114234149456
2022	-0.319765210151672