Year	Number
1996	21.5
1998	18.9054718017578
2000	28.3582096099854
2002	46.766170501709
2003	41.7910461425781
2004	36.538459777832
2005	40.3846168518066
2006	43.269229888916
2007	45.6730766296387
2008	46.1538467407227
2009	44.5497627258301
2010	45.971565246582
2011	46.948356628418
2012	45.5399055480957
2013	44.6009407043457
2014	48.2758636474609
2015	47.7832527160645
2016	48.7684745788574
2017	48.2758636474609
2018	46.6019401550293
2019	49.2753639221191
2020	47.3429946899414
2021	45.4106292724609
2022	40.5797119140625