Year	Number
1996	18.032787322998
1998	22.9508190155029
2000	23.4972686767578
2002	15.1351346969604
2003	17.2972965240479
2004	6.96517419815063
2005	10.2941179275513
2006	14.1463413238525
2007	15.0485439300537
2008	12.1359224319458
2009	7.17703342437744
2010	8.61244010925293
2011	8.05687236785889
2012	13.2701425552368
2013	10.9004735946655
2014	16.8269233703613
2015	17.619047164917
2016	28.5714282989502
2017	23.3333339691162
2018	23.8095245361328
2019	20.4761905670166
2020	30
2021	13.8095235824585
2022	10.8490562438965