Year	Number
1996	0.185647144913673
1998	0.254513829946518
2000	0.454761356115341
2002	0.26161402463913
2003	0.306020855903625
2004	0.262759476900101
2005	0.216340377926826
2006	-0.103575468063354
2007	-0.0121438568457961
2008	-0.0272660758346319
2009	-0.260273784399033
2010	-0.332702100276947
2011	-0.284884512424469
2012	-0.340788125991821
2013	-0.282051056623459
2014	-0.449199259281158
2015	-0.270875722169876
2016	-0.33524763584137
2017	-0.205016389489174
2018	-0.24039500951767
2019	-0.419854432344437
2020	-0.46087247133255
2021	-0.418640315532684
2022	-0.405177503824234