Year	Number
1996	-1.14967966079712
1998	-1.10067796707153
2000	-1.15839385986328
2002	-1.21269547939301
2003	-1.03775930404663
2004	-0.703226566314697
2005	-0.903745830059052
2006	-0.379076540470123
2007	-0.245746776461601
2008	-0.222209960222244
2009	-0.280257672071457
2010	-0.158439069986343
2011	-0.0210469923913479
2012	-0.101652063429356
2013	-0.026739789173007
2014	-0.0522533990442753
2015	-0.146019995212555
2016	0.0137040875852108
2017	0.178770422935486
2018	0.0795299112796783
2019	0.0929242670536041
2020	0.274038255214691
2021	0.22790738940239
2022	0.232485979795456