Year	Number
1996	40.2010040283203
1998	37.5
2000	37.3134346008301
2002	36.3184089660645
2003	39.3034820556641
2004	39.9038467407227
2005	39.7129173278809
2006	44.4976081848145
2007	45.4545440673828
2008	47.5961532592773
2009	49.2891006469727
2010	51.1848335266113
2011	52.1126747131348
2012	51.1737098693848
2013	53.9906120300293
2014	58.1730766296387
2015	56.6666679382324
2016	58.0952377319336
2017	59.0476188659668
2018	57.6190490722656
2019	57.6190490722656
2020	55.7142868041992
2021	55.7142868041992
2022	56.1320762634277