Year	Number
1996	0.77417254447937
1998	1.04076933860779
2000	1.05533421039581
2002	1.03079378604889
2003	1.13986682891846
2004	1.2419970035553
2005	1.03845989704132
2006	1.24783563613892
2007	1.23067355155945
2008	1.32564425468445
2009	1.27143526077271
2010	1.38622903823853
2011	1.33679676055908
2012	1.26981163024902
2013	1.2435200214386
2014	1.20616567134857
2015	1.35717535018921
2016	1.31015241146088
2017	1.34855532646179
2018	1.16934180259705
2019	1.2887442111969
2020	1.05247342586517
2021	1.25266230106354
2022	1.23656439781189