Year	Number
1996	-0.308690518140793
1998	-0.312703251838684
2000	-0.319230049848557
2002	-0.666176438331604
2003	-1.00267052650452
2004	-1.06540596485138
2005	-1.09960174560547
2006	-1.20800864696503
2007	-1.44393813610077
2008	-1.37214863300323
2009	-1.55987942218781
2010	-1.56311976909637
2011	-1.40288519859314
2012	-1.4448344707489
2013	-1.52926170825958
2014	-1.74004256725311
2015	-1.87266981601715
2016	-1.99904632568359
2017	-1.98403537273407
2018	-2.38673639297485
2019	-2.38258337974548
2020	-2.26745915412903
2021	-2.21518588066101
2022	-2.04584336280823