Year	Number
1996	-1.82689917087555
1998	-1.74977505207062
2000	-1.73482882976532
2002	-1.60501539707184
2003	-1.63183975219727
2004	-1.85596883296967
2005	-1.5897102355957
2006	-1.34798407554626
2007	-1.11355566978455
2008	-1.27424573898315
2009	-1.17583811283112
2010	-1.04009187221527
2011	-1.08162319660187
2012	-1.0499324798584
2013	-0.92324286699295
2014	-0.880495667457581
2015	-0.904000461101532
2016	-0.976915776729584
2017	-0.983210861682892
2018	-0.989606022834778
2019	-1.00815343856812
2020	-1.0389438867569
2021	-0.963078558444977
2022	-0.980886161327362