Year	Number
1996	16.582914352417
1998	9
2000	6.46766185760498
2002	14.9253730773926
2003	16.4179096221924
2004	16.3461532592773
2005	14.8325357437134
2006	19.1387557983398
2007	20.0956935882568
2008	21.634614944458
2009	27.488151550293
2010	31.7535552978516
2011	30.046947479248
2012	27.6995296478271
2013	27.2300472259521
2014	33.6538467407227
2015	32.8571434020996
2016	30.4761905670166
2017	28.5714282989502
2018	27.1428565979004
2019	26.1904754638672
2020	29.5238094329834
2021	32.3809509277344
2022	38.6792449951172