Year	Number
1996	18
1998	20.3980102539063
2000	29.8507461547852
2002	29.3532333374023
2003	19.4029846191406
2004	23.0769233703613
2005	33.1730766296387
2006	29.3269233703613
2007	27.4038467407227
2008	27.884614944458
2009	27.488151550293
2010	26.5402851104736
2011	25.3521118164063
2012	10.7981224060059
2013	11.2676057815552
2014	24.630542755127
2015	26.6009845733643
2016	26.1083736419678
2017	24.630542755127
2018	28.1553401947021
2019	32.3671493530273
2020	34.2995185852051
2021	38.164249420166
2022	35.7487907409668