Year	Number
1996	-0.161426275968552
1998	-0.292461693286896
2000	0.510653853416443
2002	0.55671101808548
2003	0.623684108257294
2004	0.658320605754852
2005	0.452612310647964
2006	0.48149374127388
2007	0.517976045608521
2008	0.467806965112686
2009	0.48627769947052
2010	0.476428359746933
2011	0.521082401275635
2012	0.540830552577972
2013	0.513741314411163
2014	0.514960289001465
2015	0.555522322654724
2016	0.525383710861206
2017	0.479182928800583
2018	0.446271419525146
2019	0.454199224710464
2020	0.579718291759491
2021	0.601966202259064
2022	0.613270461559296