Year	Number
1996	57.7889442443848
1998	54.5
2000	56.7164192199707
2002	61.1940307617188
2003	59.7014923095703
2004	58.1730766296387
2005	57.4162673950195
2006	56.9377975463867
2007	56.9377975463867
2008	54.3269233703613
2009	51.6587677001953
2010	51.1848335266113
2011	52.1126747131348
2012	52.1126747131348
2013	46.478874206543
2014	50.480770111084
2015	58.0952377319336
2016	57.1428565979004
2017	54.2857131958008
2018	53.8095245361328
2019	53.8095245361328
2020	53.8095245361328
2021	53.3333320617676
2022	52.3584899902344