Year	Number
1996	54.2713584899902
1998	55
2000	48.756217956543
2002	49.7512435913086
2003	48.2587051391602
2004	42.788459777832
2005	37.3205757141113
2006	31.5789470672607
2007	34.9282302856445
2008	25.480770111084
2009	19.9052124023438
2010	25.5924167633057
2011	25.8215961456299
2012	25.8215961456299
2013	22.5352115631104
2014	21.634614944458
2015	17.619047164917
2016	17.619047164917
2017	16.1904754638672
2018	16.6666660308838
2019	18.5714282989502
2020	16.6666660308838
2021	19.5238094329834
2022	15.5660381317139