Year	Number
1996	23.9130439758301
1998	21.1956520080566
2000	19.0217399597168
2002	28.6486492156982
2003	29.7297306060791
2004	34.825870513916
2005	27.9411773681641
2006	31.3725490570068
2007	36.4077682495117
2008	39.3203887939453
2009	47.3684196472168
2010	52.1531105041504
2011	52.6066360473633
2012	50.7108993530273
2013	51.6587677001953
2014	59.6153831481934
2015	57.1428565979004
2016	54.2857131958008
2017	51.9047622680664
2018	59.523811340332
2019	59.523811340332
2020	56.1904754638672
2021	53.3333320617676
2022	56.1320762634277