Year	Number
1996	56.2814064025879
1998	53.5
2000	47.2636833190918
2002	52.7363166809082
2003	55.7213935852051
2004	52.4038467407227
2005	52.1531105041504
2006	53.5885162353516
2007	55.5023918151855
2008	56.25
2009	55.9241714477539
2010	60.1895751953125
2011	57.2769966125488
2012	58.6854476928711
2013	56.8075103759766
2014	62.019229888916
2015	59.0476188659668
2016	61.4285697937012
2017	56.1904754638672
2018	57.6190490722656
2019	57.1428565979004
2020	58.0952377319336
2021	57.1428565979004
2022	58.0188674926758