Year	Number
2003	1.16978526115417
2004	1.36335968971252
2005	1.28212440013885
2006	1.20838665962219
2007	0.802670180797577
2008	0.920431792736053
2009	1.09165251255035
2010	1.03611218929291
2011	0.957588255405426
2012	0.975788056850433
2013	0.958863377571106
2014	0.572488188743591
2015	0.564717531204224
2016	0.606805443763733
2017	0.628548622131348
2018	0.677222847938538
2019	0.700797915458679
2020	0.929504930973053
2021	0.949530005455017
2022	0.94386225938797