Year	Number
1996	5.97826099395752
1998	6.52173900604248
2000	13.043478012085
2002	17.8378372192383
2003	21.0810813903809
2004	29.8507461547852
2005	21.0784320831299
2006	21.5686283111572
2007	27.1844654083252
2008	35.9223289489746
2009	37.7990417480469
2010	38.2775115966797
2011	39.8104248046875
2012	40.7582931518555
2013	39.3364944458008
2014	38.461540222168
2015	34.2857131958008
2016	34.2857131958008
2017	35.238094329834
2018	33.8095245361328
2019	33.8095245361328
2020	31.4285717010498
2021	31.9047622680664
2022	31.1320762634277