Year	Number
2002	1.1071684256636591
2003	1.1578305773794022
2004	1.3728166475335657
2005	1.5876293662450842
2006	1.3106672078819528
2007	0.320957811671331
2008	0.49593557394088417
2009	1.04662096024641
2010	1.4131468917798127
2011	1.5062827261513363
2012	1.4865334649477318
2013	1.4474789489558528
2014	1.409458243811593
2015	1.6734640969230106
2016	2.4852616043901734
2017	4.9612903226633
2018	4.352474511313582
2019	4.731634799043655
2020	8.178859432330944
2021	6.672645360319131
2022	8.299183771779806