Year	Number
1996	1.03555142879486
1998	0.3500617146492
2000	1.22359979152679
2002	0.36293163895607
2003	1.16978526115417
2004	1.2183393239975
2005	1.00011491775513
2006	0.860106229782104
2007	0.617986261844635
2008	0.640764355659485
2009	0.685753643512726
2010	0.790275514125824
2011	0.849078357219696
2012	0.893705666065216
2013	0.85335773229599
2014	0.816450417041779
2015	0.837734758853912
2016	0.998592257499695
2017	0.974609792232513
2018	0.993263125419617
2019	0.906494319438934
2020	0.864660143852234
2021	0.831884622573853
2022	0.869225919246674