Year	Number
1996	26.0638294219971
1998	29.2553195953369
2000	19.5767192840576
2002	37.5661392211914
2003	25.6281414031982
2004	16.990291595459
2005	22.3300971984863
2006	29.9516906738281
2007	28.019323348999
2008	31.25
2009	26.0663509368896
2010	26.5402851104736
2011	27.488151550293
2012	33.1753540039063
2013	35.5450248718262
2014	24.2857151031494
2015	21.9047622680664
2016	24.761905670166
2017	33.8095245361328
2018	39.1509437561035
2019	40.0943412780762
2020	35.8490562438965
2021	34.9056587219238
2022	25.4716987609863