Year	Number
1996	58.5
1998	62.1890563964844
2000	56.7164192199707
2002	53.7313423156738
2003	52.7363166809082
2004	50.480770111084
2005	50.480770111084
2006	44.230770111084
2007	45.1923065185547
2008	44.230770111084
2009	46.9194297790527
2010	47.8672981262207
2011	48.3568077087402
2012	47.8873252868652
2013	48.8262901306152
2014	52.709358215332
2015	51.2315254211426
2016	51.2315254211426
2017	48.7684745788574
2018	47.5728149414063
2019	45.4106292724609
2020	41.062801361084
2021	40.0966186523438
2022	43.961353302002