Year	Number
1996	0.375723421573639
1998	0.416656792163849
2000	0.416736394166946
2002	0.522498726844788
2003	0.470419079065323
2004	0.417557060718536
2005	0.339725077152252
2006	0.67924028635025
2007	0.477556079626083
2008	0.306298166513443
2009	0.366235703229904
2010	0.158016294240952
2011	-0.00149573176167905
2012	-0.0522028878331184
2013	-0.0580974668264389
2014	-0.0655622854828835
2015	-0.101347163319588
2016	-0.205795958638191
2017	-0.050398975610733
2018	-0.00628353748470545
2019	-0.0353328697383404
2020	-0.188614159822464
2021	-0.210014835000038
2022	-0.299408107995987