Year	Number
1996	-0.510942339897156
1998	-0.344189405441284
2000	-0.438140958547592
2002	-0.416357487440109
2003	-0.429242461919785
2004	-0.318785130977631
2005	-0.322521358728409
2006	-0.172736719250679
2007	-0.165321603417397
2008	-0.165922626852989
2009	-0.149577632546425
2010	-0.132357180118561
2011	-0.0597142279148102
2012	-0.0639913454651833
2013	-0.0812788382172585
2014	-0.0433012023568153
2015	0.00393945025280118
2016	0.121845424175262
2017	0.112486682832241
2018	0.172091424465179
2019	0.204610735177994
2020	0.143143579363823
2021	0.094382107257843
2022	0.166357532143593