Year	Number
1996	14
1998	10.4477615356445
2000	10.4477615356445
2002	10.945273399353
2003	10.945273399353
2004	8.17307662963867
2005	10.5769233703613
2006	19.230770111084
2007	19.7115383148193
2008	13.942307472229
2009	13.2701425552368
2010	13.2701425552368
2011	12.6760559082031
2012	12.2065725326538
2013	12.6760559082031
2014	19.7044334411621
2015	19.2118225097656
2016	14.2857141494751
2017	12.8078813552856
2018	13.1067962646484
2019	17.8743953704834
2020	20.2898559570313
2021	20.7729473114014
2022	21.7391300201416