Year	Number
1996	-0.379187554121017
1998	-0.546053230762482
2000	-0.227864950895309
2002	-0.254789859056473
2003	-0.312842577695847
2004	-0.131729558110237
2005	-0.162092119455338
2006	0.0470300763845444
2007	0.215346544981003
2008	0.049528993666172
2009	-0.114492610096931
2010	-0.0294270031154156
2011	0.0240315701812506
2012	-0.0253867004066706
2013	-0.0462945364415646
2014	-0.146388962864876
2015	-0.220544874668121
2016	-0.149085000157356
2017	-0.284803956747055
2018	-0.237621992826462
2019	-0.283249706029892
2020	-0.252887934446335
2021	-0.750981390476227
2022	-0.722118079662323