Year	Number
1996	0.00126244104467332
1998	-0.126968279480934
2000	-0.0515826977789402
2002	-0.0114680724218488
2003	-0.00235446891747415
2004	0.0133178951218724
2005	-0.00122323480900377
2006	-0.278967440128326
2007	-0.246213480830193
2008	-0.129783600568771
2009	-0.0833449959754944
2010	-0.174863860011101
2011	-0.483893096446991
2012	-0.536399841308594
2013	-0.735893428325653
2014	-0.698362648487091
2015	-0.602962195873261
2016	-0.478956431150436
2017	-0.449750900268555
2018	-0.30214911699295
2019	-0.333438783884048
2020	-0.319997310638428
2021	-0.259292423725128
2022	-0.263772666454315