Year	Number
1996	1.03555142879486
1998	1.11396324634552
2000	1.22359979152679
2002	0.36293163895607
2003	0.764638483524323
2004	1.02682399749756
2005	1.14758777618408
2006	1.05912363529205
2007	0.788463771343231
2008	0.800574362277985
2009	0.728931725025177
2010	0.790275514125824
2011	0.849078357219696
2012	0.928883850574493
2013	0.85335773229599
2014	0.816450417041779
2015	0.987564265727997
2016	0.998592257499695
2017	0.871098697185516
2018	0.822919726371765
2019	0.937967896461487
2020	1.03254508972168
2021	1.04016363620758
2022	1.04379844665527