Year	Number
1996	-0.63423216342926
1998	-0.406373351812363
2000	-0.0298685356974602
2002	-0.144792929291725
2003	-0.045993946492672
2004	0.0412164889276028
2005	0.0833475664258003
2006	-0.0482460409402847
2007	0.0384777560830116
2008	0.0250067282468081
2009	0.0438759475946426
2010	0.0804690346121788
2011	0.109395980834961
2012	0.145079001784325
2013	0.178020223975182
2014	0.218247041106224
2015	0.127141326665878
2016	0.340458124876022
2017	0.308140724897385
2018	0.301379770040512
2019	0.348271518945694
2020	0.236004218459129
2021	0.275992751121521
2022	0.368116319179535