Year	Number
1996	13.297872543335
1998	27.1276588439941
2000	4.23280429840088
2002	11.640212059021
2003	23.6180896759033
2004	17.4757289886475
2005	16.019416809082
2006	3.38164258003235
2007	1.93236720561981
2008	2.4038462638855
2009	2.84360194206238
2010	4.7393364906311
2011	9.95260620117188
2012	11.3744077682495
2013	11.8483409881592
2014	14.2857141494751
2015	32.8571434020996
2016	31.4285717010498
2017	21.4285717010498
2018	16.5094337463379
2019	18.3962268829346
2020	22.1698112487793
2021	17.4528293609619
2022	16.9811325073242