Year	Number
1996	-0.456720739603043
1998	-0.0699411630630493
2000	-0.325264573097229
2002	0.00812013912945986
2003	0.0415767580270767
2004	0.123799182474613
2005	0.106631450355053
2006	0.120091959834099
2007	0.0823792815208435
2008	-0.0610706247389317
2009	0.0536668114364147
2010	0.0438957661390305
2011	-0.072912722826004
2012	-0.00268616923131049
2013	-0.20580980181694
2014	0.0810932070016861
2015	0.0342932753264904
2016	-0.116127513349056
2017	-0.249828547239304
2018	-0.431270897388458
2019	-0.286847949028015
2020	-0.118913285434246
2021	-0.109315782785416
2022	-0.152863919734955