Year	Number
1996	36.6834182739258
1998	39.5
2000	40.2985076904297
2002	31.8407955169678
2003	30.348258972168
2004	34.6153831481934
2005	43.5406684875488
2006	37.7990417480469
2007	38.2775115966797
2008	38.9423065185547
2009	36.0189590454102
2010	33.6492881774902
2011	35.2112693786621
2012	35.2112693786621
2013	39.4366188049316
2014	42.788459777832
2015	43.3333320617676
2016	56.1904754638672
2017	54.761905670166
2018	52.3809509277344
2019	51.9047622680664
2020	46.6666679382324
2021	47.1428565979004
2022	47.6415100097656