Year	Number
1996	48.4042549133301
1998	45.2127647399902
2000	35.9788360595703
2002	20.6349201202393
2003	23.1155776977539
2004	18.9320392608643
2005	22.8155345916748
2006	21.2560386657715
2007	19.3236713409424
2008	16.8269233703613
2009	19.9052124023438
2010	19.9052124023438
2011	24.6445503234863
2012	24.1706161499023
2013	23.222749710083
2014	27.619047164917
2015	22.8571434020996
2016	21.4285717010498
2017	15.2380952835083
2018	13.2075471878052
2019	11.7924528121948
2020	11.3207550048828
2021	13.2075471878052
2022	16.0377349853516