Year	Number
1996	1.41046285629272
1998	1.11060059070587
2000	0.822056412696838
2002	1.35895538330078
2003	0.962002456188202
2004	1.08964920043945
2005	1.10395002365112
2006	1.07445085048676
2007	1.284419298172
2008	1.33927059173584
2009	1.19087398052216
2010	1.15264821052551
2011	1.19352161884308
2012	1.34056687355042
2013	1.36410057544708
2014	1.27070045471191
2015	1.12933051586151
2016	0.8921759724617
2017	1.02962338924408
2018	0.884671747684479
2019	0.892080426216125
2020	0.887528836727142
2021	0.899418652057648
2022	0.637995362281799