Year	Number
1996	9.57446765899658
1998	10.638298034668
2000	17.4603176116943
2002	20.1058197021484
2003	20.6030158996582
2004	13.5922327041626
2005	7.76699018478394
2006	0.966183602809906
2007	0.483091801404953
2008	1.92307686805725
2009	4.26540279388428
2010	3.3175356388092
2011	3.3175356388092
2012	3.79146909713745
2013	3.79146909713745
2014	5.7142858505249
2015	4.7619047164917
2016	5.7142858505249
2017	5.2380952835083
2018	5.18867921829224
2019	4.24528312683105
2020	4.24528312683105
2021	5.18867921829224
2022	6.60377359390259