Year	Number
1996	0.11151909083128
1998	0.0955900400876999
2000	0.12469719350338
2002	0.120319604873657
2003	-0.107514306902885
2004	-0.149054154753685
2005	-0.105527251958847
2006	-0.310118108987808
2007	-0.329598039388657
2008	-0.30901512503624
2009	-0.345606595277786
2010	-0.356885224580765
2011	-0.378650426864624
2012	-0.482446640729904
2013	-0.525301456451416
2014	-0.466464132070541
2015	-0.298838138580322
2016	-0.169851243495941
2017	-0.138816744089127
2018	-0.131240993738174
2019	-0.220120951533318
2020	-0.122583754360676
2021	-0.08303402364254
2022	-0.0836108103394508