Year	Number
1996	31.9148941040039
1998	27.659574508667
2000	34.3915328979492
2002	38.0952377319336
2003	38.6934661865234
2004	40.2912635803223
2005	43.6893196105957
2006	47.8260879516602
2007	42.9951705932617
2008	48.5576934814453
2009	41.7061614990234
2010	43.6018943786621
2011	41.2322273254395
2012	41.7061614990234
2013	45.497631072998
2014	53.8095245361328
2015	57.6190490722656
2016	57.1428565979004
2017	57.1428565979004
2018	56.6037750244141
2019	55.6603775024414
2020	53.7735862731934
2021	47.1698112487793
2022	50