Year	Number
1996	0.0303032286465168
1998	0.0419004894793034
2000	0.0232060719281435
2002	-0.0258125066757202
2003	-0.0487161204218864
2004	-0.00896652322262526
2005	-0.0504829846322536
2006	-0.0448924377560616
2007	-0.0826621428132057
2008	-0.303847908973694
2009	-0.241460204124451
2010	-0.269351810216904
2011	-0.323420256376266
2012	-0.355457723140717
2013	-0.272673457860947
2014	-0.207312658429146
2015	-0.0776286944746971
2016	-0.140860006213188
2017	-0.0731016919016838
2018	-0.141316264867783
2019	-0.260609269142151
2020	-0.208590477705002
2021	-0.219749256968498
2022	-0.272904604673386