Year	Number
1996	0.717076897621155
1998	0.728511989116669
2000	0.713235020637512
2002	0.792559921741486
2003	0.851720035076141
2004	1.23474931716919
2005	1.18966603279114
2006	1.10479998588562
2007	1.08573806285858
2008	1.11250960826874
2009	1.09262681007385
2010	1.14963793754578
2011	1.33636081218719
2012	0.959384381771088
2013	1.01761531829834
2014	1.04634726047516
2015	1.12869369983673
2016	1.14077579975128
2017	1.16260969638824
2018	1.11062347888947
2019	1.40138220787048
2020	1.45637333393097
2021	1.62458038330078
2022	1.64943766593933