Year	Number
1996	0.942838490009308
1998	0.883640766143799
2000	0.574339628219604
2002	0.449922442436218
2003	1.08701109886169
2004	0.893403232097626
2005	0.871916949748993
2006	0.854816734790802
2007	0.928755760192871
2008	0.912390053272247
2009	0.937309503555298
2010	0.938382148742676
2011	0.854587376117706
2012	0.953947246074677
2013	0.912419855594635
2014	1.30612897872925
2015	0.989677846431732
2016	1.09102046489716
2017	1.52906262874603
2018	1.59051811695099
2019	1.57226634025574
2020	1.61823654174805
2021	1.50712108612061
2022	1.51425933837891