Year	Number
1996	2.23130798339844
1998	2.1966609954834
2000	2.32117748260498
2002	2.31065106391907
2003	2.35876488685608
2004	2.40682458877563
2005	2.27820563316345
2006	2.45911836624146
2007	2.43483400344849
2008	2.37640881538391
2009	2.4354944229126
2010	2.35235905647278
2011	2.39288401603699
2012	2.3824622631073
2013	2.39926409721375
2014	2.25234031677246
2015	2.18606233596802
2016	2.20288515090942
2017	2.19013214111328
2018	2.15647912025452
2019	2.12161731719971
2020	2.23646879196167
2021	2.33375263214111
2022	2.40274429321289