Year	Number
1996	60.7526893615723
1998	52.9411773681641
2000	46.2765960693359
2002	51.8518524169922
2003	58.7301597595215
2004	54.1871910095215
2005	56.0975608825684
2006	55.1219520568848
2007	53.3980598449707
2008	53.3980598449707
2009	53.5885162353516
2010	54.2857131958008
2011	55.4502372741699
2012	55.4502372741699
2013	57.8199043273926
2014	54.8076934814453
2015	51.4285697937012
2016	47.6190490722656
2017	43.8095245361328
2018	41.9047622680664
2019	40
2020	39.523811340332
2021	41.4285697937012
2022	39.1509437561035