Year	Number
1996	43.2160797119141
1998	30.5
2000	32.8358192443848
2002	32.8358192443848
2003	31.343282699585
2004	37.5
2005	36.3636360168457
2006	39.7129173278809
2007	38.7559814453125
2008	40.8653831481934
2009	44.5497627258301
2010	44.0758285522461
2011	45.0704231262207
2012	49.7652587890625
2013	51.6431922912598
2014	51.9230766296387
2015	45.7142868041992
2016	47.1428565979004
2017	46.6666679382324
2018	45.238094329834
2019	46.1904754638672
2020	42.3809509277344
2021	41.4285697937012
2022	41.5094337463379