Year	Number
1996	-0.209069982171059
1998	0.307698369026184
2000	-0.065564900636673
2002	-0.261418521404266
2003	-0.407007366418839
2004	-0.312668710947037
2005	-0.556680738925934
2006	-0.461343467235565
2007	-0.501324236392975
2008	-0.57127320766449
2009	-0.398299634456635
2010	-0.383013308048248
2011	-0.392256796360016
2012	-0.470458775758743
2013	-0.493017613887787
2014	-0.446265608072281
2015	-0.344394981861115
2016	-0.317617774009705
2017	-0.378089100122452
2018	-0.348556756973267
2019	-0.345829725265503
2020	-0.359539151191711
2021	-0.402591288089752
2022	-0.319889187812805