Year	Number
1996	-0.492861360311508
1998	-0.54577910900116
2000	-0.724985361099243
2002	-0.583924293518066
2003	-0.761302411556244
2004	-0.752638399600983
2005	-0.864246666431427
2006	-0.702513158321381
2007	-0.583475470542908
2008	-0.491690039634705
2009	-0.409247994422913
2010	-0.361598461866379
2011	-0.326602280139923
2012	-0.261282652616501
2013	-0.247296139597893
2014	-0.205342337489128
2015	-0.205608889460564
2016	-0.229902908205986
2017	-0.248081043362617
2018	-0.0895191580057144
2019	-0.13721576333046
2020	-0.13966229557991
2021	-0.222117677330971
2022	-0.169901669025421