Year	Number
1996	21.7391300201416
1998	24.456521987915
2000	32.0652160644531
2002	35.1351356506348
2003	36.7567558288574
2004	31.8407955169678
2005	28.4313716888428
2006	34.3137245178223
2007	33.980583190918
2008	35.4368934631348
2009	36.3636360168457
2010	34.4497604370117
2011	39.8104248046875
2012	44.5497627258301
2013	37.9146919250488
2014	33.1730766296387
2015	30.4761905670166
2016	29.5238094329834
2017	32.8571434020996
2018	26.6666660308838
2019	25.7142848968506
2020	25.238094329834
2021	18.5714282989502
2022	24.056604385376