Year	Number
1996	-1.69709753990173
1998	-2.17320108413696
2000	-1.86868572235107
2002	-0.691395998001099
2003	-1.08121025562286
2004	-0.514731526374817
2005	-0.481067776679993
2006	-0.302883803844452
2007	-0.0615781955420971
2008	-0.239808902144432
2009	-0.289030253887177
2010	-0.236645370721817
2011	-0.168444857001305
2012	-0.279945284128189
2013	-0.174718275666237
2014	-0.104039676487446
2015	-0.106272891163826
2016	-0.167113155126572
2017	-0.0394270978868008
2018	-0.088885597884655
2019	-0.0569588094949722
2020	-0.302403092384338
2021	-0.0970258787274361
2022	-0.0895016714930534