Year	Number
1996	-0.659695029258728
1998	-0.474878489971161
2000	-0.466838240623474
2002	-0.415403097867966
2003	-0.612619996070862
2004	-0.5928635597229
2005	-0.532331883907318
2006	-0.999498069286346
2007	-0.939466238021851
2008	-0.858251392841339
2009	-0.871679723262787
2010	-0.915250718593597
2011	-0.900145947933197
2012	-0.8656907081604
2013	-0.924281895160675
2014	-1.04220545291901
2015	-0.901420474052429
2016	-0.989753305912018
2017	-1.02763438224792
2018	-1.13269829750061
2019	-1.1687958240509
2020	-1.17946791648865
2021	-1.24803817272186
2022	-1.1268949508667