Year	Number
1996	14.8936166763306
1998	11.702127456665
2000	21.6931209564209
2002	25.3968257904053
2003	27.1356792449951
2004	30.5825233459473
2005	34.9514579772949
2006	33.8164253234863
2007	31.8840579986572
2008	34.6153831481934
2009	27.014217376709
2010	27.488151550293
2011	36.4928894042969
2012	41.2322273254395
2013	41.7061614990234
2014	46.1904754638672
2015	49.523811340332
2016	53.3333320617676
2017	50.9523811340332
2018	52.8301887512207
2019	44.8113212585449
2020	40.5660362243652
2021	42.4528312683105
2022	44.8113212585449