Year	Number
1996	30.6532669067383
1998	30
2000	33.3333320617676
2002	38.3084564208984
2003	38.3084564208984
2004	44.230770111084
2005	43.0622024536133
2006	50.2392349243164
2007	48.8038291931152
2008	49.519229888916
2009	49.7630348205566
2010	47.3933639526367
2011	42.2535209655762
2012	42.2535209655762
2013	41.7840385437012
2014	43.269229888916
2015	44.761905670166
2016	45.238094329834
2017	48.0952377319336
2018	47.6190490722656
2019	49.0476188659668
2020	50.476188659668
2021	46.1904754638672
2022	40.0943412780762