Year	Number
1996	36.4130439758301
1998	39.1304359436035
2000	28.2608699798584
2002	38.3783798217773
2003	22.7027034759521
2004	15.9203977584839
2005	19.1176471710205
2006	19.1176471710205
2007	19.9029121398926
2008	18.4466018676758
2009	17.2248802185059
2010	19.1387557983398
2011	21.8009471893311
2012	24.6445503234863
2013	24.6445503234863
2014	30.2884616851807
2015	32.3809509277344
2016	37.6190490722656
2017	35.238094329834
2018	43.8095245361328
2019	42.3809509277344
2020	37.6190490722656
2021	43.3333320617676
2022	46.2264137268066