Year	Number
1996	33.3333320617676
1998	22.9946517944336
2000	16.4893608093262
2002	22.7513236999512
2003	29.6296291351318
2004	29.0640392303467
2005	40.9756088256836
2006	35.1219520568848
2007	33.009708404541
2008	33.4951438903809
2009	30.6220092773438
2010	34.761905670166
2011	34.5971565246582
2012	36.0189590454102
2013	39.3364944458008
2014	31.25
2015	30.4761905670166
2016	30
2017	31.9047622680664
2018	28.5714282989502
2019	28.0952377319336
2020	27.619047164917
2021	29.5238094329834
2022	28.301887512207