Year	Number
1996	1.33128821849823
1998	1.06172382831573
2000	1.08123648166656
2002	1.12628424167633
2003	1.19230818748474
2004	0.873254597187042
2005	0.89903998374939
2006	1.08556258678436
2007	1.07337045669556
2008	1.19312751293182
2009	0.905417799949646
2010	0.969285845756531
2011	0.859248042106628
2012	1.24330234527588
2013	1.23851442337036
2014	1.07114279270172
2015	0.972111999988556
2016	0.789838016033173
2017	0.746573090553284
2018	0.607826232910156
2019	0.599219381809235
2020	0.349622398614883
2021	0.369634807109833
2022	0.421609163284302