Year	Number
1996	-0.398885548114777
1998	-0.433163523674011
2000	-0.404046177864075
2002	-0.306404739618301
2003	-0.154854536056519
2004	-0.429986923933029
2005	-0.367371052503586
2006	-0.221562147140503
2007	-0.272556155920029
2008	-0.206874340772629
2009	-0.332539886236191
2010	-0.253887414932251
2011	-0.243967726826668
2012	-0.404069632291794
2013	-0.46063831448555
2014	-0.599589347839355
2015	-0.603387415409088
2016	-0.429547399282455
2017	-0.561924517154694
2018	-0.597704648971558
2019	-0.509206771850586
2020	-0.524174213409424
2021	-0.653225958347321
2022	-0.807577431201935