Year	Number
1996	21.1055278778076
1998	20
2000	20.8955230712891
2002	34.3283576965332
2003	33.3333320617676
2004	39.9038467407227
2005	31.1004791259766
2006	46.8899536132813
2007	48.8038291931152
2008	48.5576934814453
2009	47.3933639526367
2010	48.8151664733887
2011	52.1126747131348
2012	51.1737098693848
2013	52.582160949707
2014	62.019229888916
2015	60.476188659668
2016	58.0952377319336
2017	55.7142868041992
2018	55.7142868041992
2019	56.1904754638672
2020	55.238094329834
2021	55.238094329834
2022	55.6603775024414