Year	Number
1996	36.1702117919922
1998	52.1276588439941
2000	59.2592582702637
2002	61.375659942627
2003	58.2914581298828
2004	53.3980598449707
2005	45.6310691833496
2006	39.613525390625
2007	33.8164253234863
2008	29.8076915740967
2009	34.5971565246582
2010	33.1753540039063
2011	37.9146919250488
2012	36.9668235778809
2013	36.0189590454102
2014	27.619047164917
2015	28.5714282989502
2016	34.761905670166
2017	29.5238094329834
2018	34.9056587219238
2019	26.8867931365967
2020	29.2452831268311
2021	33.9622650146484
2022	33.4905662536621