Year	Number
1996	-0.636936128139496
1998	-0.599871158599854
2000	-0.650617778301239
2002	-0.498171955347061
2003	-0.710449934005737
2004	-1.08351111412048
2005	-0.951148569583893
2006	-0.552061259746552
2007	-0.573425590991974
2008	-0.467783868312836
2009	-0.429547071456909
2010	-0.298220843076706
2011	-0.521195828914642
2012	-0.386057704687119
2013	-0.369537502527237
2014	-0.494346857070923
2015	-0.539831638336182
2016	-0.541618824005127
2017	-0.491562604904175
2018	-0.672255098819733
2019	-0.638883948326111
2020	-0.753389954566956
2021	-0.749074459075928
2022	-0.686120450496674