Year	Number
1996	0.722760617733002
1998	0.619043707847595
2000	0.888868987560272
2002	1.08718740940094
2003	1.05612015724182
2004	1.22528505325317
2005	1.29252052307129
2006	1.08234477043152
2007	1.10488200187683
2008	1.01350831985474
2009	1.01689624786377
2010	1.09564626216888
2011	1.07390916347504
2012	1.07694518566132
2013	1.10628545284271
2014	1.05593979358673
2015	1.00450599193573
2016	0.995688796043396
2017	1.00042903423309
2018	1.02587056159973
2019	0.981557965278625
2020	0.992628812789917
2021	0.958194434642792
2022	0.972975134849548