Year	Number
1996	-0.408734709024429
1998	-0.497554004192352
2000	-0.485356152057648
2002	-0.418498694896698
2003	-0.148626938462257
2004	-0.0960905030369759
2005	-0.180461525917053
2006	-0.274100661277771
2007	-0.343958228826523
2008	-0.338716268539429
2009	-0.101630218327045
2010	0.0223116930574179
2011	-0.120911702513695
2012	-0.137205541133881
2013	-0.0807817652821541
2014	-0.295429080724716
2015	-0.365562856197357
2016	-0.416773974895477
2017	-0.378438919782639
2018	-0.454621404409409
2019	-0.532850027084351
2020	-0.768814563751221
2021	-0.905129551887512
2022	-1.13251137733459