Year	Number
1996	14.8936166763306
1998	11.702127456665
2000	19.0476188659668
2002	26.9841270446777
2003	25.6281414031982
2004	20.8737869262695
2005	3.88349509239197
2006	17.3913040161133
2007	20.2898559570313
2008	25
2009	26.0663509368896
2010	25.5924167633057
2011	28.4360198974609
2012	21.8009471893311
2013	21.8009471893311
2014	28.5714282989502
2015	25.7142848968506
2016	25.238094329834
2017	10.9523811340332
2018	11.3207550048828
2019	11.7924528121948
2020	10.8490562438965
2021	13.2075471878052
2022	12.7358493804932