Year	Number
1996	0.388550758361816
1998	0.401742517948151
2000	0.364934474229813
2002	0.301497399806976
2003	0.319293677806854
2004	-0.0281551741063595
2005	0.504941284656525
2006	0.379048317670822
2007	0.260736405849457
2008	0.206054359674454
2009	0.058956578373909
2010	0.001401282614097
2011	0.0552023649215698
2012	0.0239774361252785
2013	0.0664704516530037
2014	0.584478735923767
2015	0.668785691261292
2016	0.689425587654114
2017	0.707315444946289
2018	0.622275352478027
2019	0.436201512813568
2020	0.541092038154602
2021	0.37718465924263
2022	0.304703801870346