Year	Number
1996	37
1998	34.825870513916
2000	30.8457717895508
2002	26.8656711578369
2003	24.8756217956543
2004	21.634614944458
2005	24.0384616851807
2006	28.8461532592773
2007	25
2008	28.8461532592773
2009	32.2274894714355
2010	33.1753540039063
2011	30.9859161376953
2012	29.1079807281494
2013	29.1079807281494
2014	27.5862064361572
2015	26.6009845733643
2016	24.1379318237305
2017	23.645320892334
2018	21.8446598052979
2019	22.2222213745117
2020	21.7391300201416
2021	21.2560386657715
2022	21.7391300201416