Year	Number
1996	-0.425952553749084
1998	-0.396506130695343
2000	-0.330610305070877
2002	-0.600399971008301
2003	-0.644967973232269
2004	-0.804753959178925
2005	-0.993771374225616
2006	-0.767391502857208
2007	-0.6065873503685
2008	-0.68917840719223
2009	-0.578488111495972
2010	-0.56959456205368
2011	-0.527206063270569
2012	-0.524210631847382
2013	-0.522182047367096
2014	-0.354396224021912
2015	-0.567924320697784
2016	-0.566701650619507
2017	-0.666323840618134
2018	-0.528640508651733
2019	-0.543229758739471
2020	-0.683947443962097
2021	-0.829443156719208
2022	-0.682209134101868