Year	Number
1996	41.2060317993164
1998	42.5
2000	41.2935333251953
2002	47.7611923217773
2003	46.2686576843262
2004	55.288459777832
2005	51.6746406555176
2006	55.5023918151855
2007	55.9808616638184
2008	56.730770111084
2009	58.2938385009766
2010	54.502368927002
2011	49.7652587890625
2012	51.1737098693848
2013	49.7652587890625
2014	56.25
2015	55.7142868041992
2016	54.2857131958008
2017	57.1428565979004
2018	55.7142868041992
2019	55.7142868041992
2020	55.7142868041992
2021	53.8095245361328
2022	50.9433975219727