Year	Number
1996	1.52612578868866
1998	1.59480345249176
2000	1.75868117809296
2002	1.30267989635468
2003	1.16180562973022
2004	1.01623916625977
2005	0.98810088634491
2006	0.902736186981201
2007	0.778468787670136
2008	0.86355197429657
2009	0.945019245147705
2010	0.940750122070313
2011	1.11363077163696
2012	1.18746471405029
2013	1.14381539821625
2014	1.04511535167694
2015	0.912540197372437
2016	0.896933197975159
2017	0.907122313976288
2018	0.838097333908081
2019	0.821221172809601
2020	0.830863893032074
2021	0.892923951148987
2022	0.717304825782776