Year	Number
1996	29.1457290649414
1998	29
2000	31.8407955169678
2002	21.3930339813232
2003	26.3681583404541
2004	17.7884616851807
2005	23.4449768066406
2006	13.8755979537964
2007	21.5311012268066
2008	21.634614944458
2009	15.1658763885498
2010	12.7962083816528
2011	13.1455402374268
2012	14.0845069885254
2013	13.6150236129761
2014	7.21153831481934
2015	5.2380952835083
2016	8.09523773193359
2017	7.14285707473755
2018	7.14285707473755
2019	6.1904764175415
2020	7.61904764175415
2021	7.61904764175415
2022	8.01886749267578