Year	Number
1996	1.92678117752075
1998	1.90416312217712
2000	1.88826286792755
2002	1.90083611011505
2003	1.34903717041016
2004	1.25668025016785
2005	1.28759801387787
2006	1.27981781959534
2007	1.24660122394562
2008	1.27092468738556
2009	1.26418006420135
2010	1.24645340442657
2011	1.23643040657043
2012	1.24758815765381
2013	1.22132623195648
2014	1.17549276351929
2015	1.13080954551697
2016	1.1409375667572
2017	1.18211960792542
2018	1.15808200836182
2019	1.12526774406433
2020	1.07522451877594
2021	1.23964309692383
2022	1.26233518123627