Year	Number
1996	16.5
1998	28.3582096099854
2000	28.3582096099854
2002	26.8656711578369
2003	26.8656711578369
2004	22.5961532592773
2005	23.0769233703613
2006	20.6730766296387
2007	20.1923084259033
2008	17.3076915740967
2009	15.1658763885498
2010	16.1137447357178
2011	22.0657272338867
2012	25.3521118164063
2013	25.3521118164063
2014	25.6157627105713
2015	25.6157627105713
2016	24.1379318237305
2017	24.630542755127
2018	34.9514579772949
2019	39.1304359436035
2020	39.1304359436035
2021	39.613525390625
2022	41.5458946228027