Year	Number
1996	1.95137453079224
1998	1.88688313961029
2000	1.98398292064667
2002	2.01014494895935
2003	1.64305710792542
2004	1.82256400585175
2005	1.64741575717926
2006	1.87307953834534
2007	1.96152448654175
2008	1.9571373462677
2009	1.96353781223297
2010	2.03858494758606
2011	2.15315341949463
2012	2.1143639087677
2013	2.1157751083374
2014	2.06938242912292
2015	2.05357670783997
2016	2.04964756965637
2017	1.94049072265625
2018	2.04786849021912
2019	2.07251167297363
2020	2.023770570755
2021	1.84118163585663
2022	1.88360249996185