Year	Number
1996	28.7234039306641
1998	35.1063842773438
2000	48.6772499084473
2002	42.8571434020996
2003	37.6884422302246
2004	42.2330093383789
2005	41.262134552002
2006	40.0966186523438
2007	39.613525390625
2008	38.9423065185547
2009	36.0189590454102
2010	41.7061614990234
2011	46.445499420166
2012	41.7061614990234
2013	44.0758285522461
2014	38.0952377319336
2015	34.761905670166
2016	28.0952377319336
2017	29.5238094329834
2018	24.5283012390137
2019	27.8301887512207
2020	28.7735843658447
2021	29.2452831268311
2022	34.4339637756348