Year	Number
1996	-0.088463768362999
1998	0.0645511597394943
2000	-0.133616417646408
2002	-0.58310067653656
2003	-0.428266704082489
2004	-0.542294263839722
2005	-0.52810263633728
2006	-0.252313852310181
2007	-0.261939287185669
2008	-0.246654763817787
2009	-0.148771479725838
2010	-0.190968170762062
2011	-0.245419502258301
2012	-0.206084370613098
2013	-0.17875400185585
2014	-0.0642066895961761
2015	-0.0041323727928102
2016	-0.0300785973668098
2017	-0.0306920241564512
2018	-0.0756177753210068
2019	-0.110343344509602
2020	0.00411719735711813
2021	0.0745439603924751
2022	0.0689592435956001