Year	Number
1996	1.35400760173798
1998	1.14857256412506
2000	1.015101313591
2002	1.19631850719452
2003	1.08441746234894
2004	0.911944389343262
2005	0.823018372058868
2006	1.00024521350861
2007	0.843343794345856
2008	0.884931147098541
2009	0.803259551525116
2010	0.750026702880859
2011	0.797708332538605
2012	0.902115404605865
2013	0.906050980091095
2014	0.860894560813904
2015	0.907211899757385
2016	1.1470742225647
2017	0.790336132049561
2018	0.753771841526031
2019	0.774113774299622
2020	0.536935448646545
2021	0.829616546630859
2022	0.781038999557495