Year	Number
1996	0.0121427616104484
1998	-0.0676826238632202
2000	-0.0457374341785908
2002	0.280810177326202
2003	0.336165219545364
2004	0.248863771557808
2005	0.247933819890022
2006	0.297409027814865
2007	0.22539059817791
2008	0.202510952949524
2009	0.0696147605776787
2010	0.158107548952103
2011	0.167899787425995
2012	-0.495530128479004
2013	-0.2845079600811
2014	-0.161109298467636
2015	-0.197715267539024
2016	-0.182319134473801
2017	-0.211932972073555
2018	-0.327701359987259
2019	-0.442345589399338
2020	-0.735177457332611
2021	-0.777718245983124
2022	-0.902199983596802