Year	Number
1996	32.6633148193359
1998	14
2000	22.3880596160889
2002	23.3830852508545
2003	23.3830852508545
2004	21.634614944458
2005	10.5263156890869
2006	16.7464122772217
2007	19.1387557983398
2008	19.230770111084
2009	17.5355453491211
2010	16.1137447357178
2011	16.9014091491699
2012	20.1877937316895
2013	19.2488269805908
2014	19.230770111084
2015	20
2016	18.5714282989502
2017	19.0476188659668
2018	19.0476188659668
2019	21.9047622680664
2020	20.4761905670166
2021	21.9047622680664
2022	23.1132068634033