Year	Number
1996	1.2723194360733
1998	1.19527661800385
2000	1.32326984405518
2002	1.28342258930206
2003	1.33304226398468
2004	1.59744584560394
2005	1.44395637512207
2006	1.37877368927002
2007	1.3355964422226
2008	1.32102286815643
2009	1.30330049991608
2010	1.28999388217926
2011	1.29741168022156
2012	1.33913254737854
2013	1.32903707027435
2014	1.27581655979156
2015	1.297856092453
2016	1.29539489746094
2017	1.36306583881378
2018	1.38167774677277
2019	1.26276564598083
2020	1.23114216327667
2021	1.26468479633331
2022	1.23219263553619