Year	Number
1996	0.473718643188477
1998	0.290556639432907
2000	0.613540589809418
2002	0.796305239200592
2003	0.790476679801941
2004	0.815539062023163
2005	0.924596548080444
2006	0.984207689762115
2007	1.20181572437286
2008	0.994486927986145
2009	1.02481615543365
2010	1.14781618118286
2011	1.15794360637665
2012	1.07450258731842
2013	1.00390338897705
2014	1.03592240810394
2015	0.97769683599472
2016	1.02176225185394
2017	1.02897393703461
2018	1.13534736633301
2019	1.33259665966034
2020	1.37035512924194
2021	1.36732113361359
2022	1.34957349300385