Year	Number
1996	-0.307817906141281
1998	-0.162360101938248
2000	0.0562669634819031
2002	0.290830373764038
2003	0.483918994665146
2004	0.313402563333511
2005	0.0141627388074994
2006	-0.365050613880157
2007	-0.247773513197899
2008	-0.237366229295731
2009	-0.137239441275597
2010	-0.493476390838623
2011	-0.950841903686523
2012	-1.12995493412018
2013	-1.33541774749756
2014	-0.907474875450134
2015	-1.06826269626617
2016	-0.792700231075287
2017	-0.958746016025543
2018	-0.846307814121246
2019	-0.62683516740799
2020	-0.610109269618988
2021	-0.524779736995697
2022	-0.407028496265411