Year	Number
1996	50.5376358032227
1998	51.8716583251953
2000	45.7446823120117
2002	44.9735450744629
2003	43.3862419128418
2004	45.8128089904785
2005	42.926830291748
2006	41.9512176513672
2007	46.1165046691895
2008	54.3689308166504
2009	47.3684196472168
2010	43.8095245361328
2011	44.0758285522461
2012	44.0758285522461
2013	43.6018943786621
2014	43.75
2015	41.9047622680664
2016	32.8571434020996
2017	31.4285717010498
2018	30.4761905670166
2019	30.4761905670166
2020	30
2021	30.4761905670166
2022	28.7735843658447