Year	Number
1996	0.717076897621155
1998	0.728511989116669
2000	0.713235020637512
2002	0.792559921741486
2003	0.851720035076141
2004	0.893765926361084
2005	0.819073557853699
2006	0.77465146780014
2007	0.771330535411835
2008	0.795972287654877
2009	0.693532228469849
2010	0.911838114261627
2011	0.964122116565704
2012	0.98025369644165
2013	0.970303058624268
2014	0.913897812366486
2015	0.961817383766174
2016	0.975613653659821
2017	0.981489479541779
2018	1.13303458690643
2019	1.0513995885849
2020	1.00336503982544
2021	1.00239610671997
2022	1.03453397750854