Year	Number
1996	20.6030158996582
1998	20.5
2000	29.3532333374023
2002	25.8706474304199
2003	30.8457717895508
2004	36.538459777832
2005	38.2775115966797
2006	42.1052627563477
2007	42.5837326049805
2008	43.75
2009	48.8151664733887
2010	49.7630348205566
2011	44.6009407043457
2012	41.7840385437012
2013	37.0892028808594
2014	33.6538467407227
2015	34.2857131958008
2016	35.7142868041992
2017	38.0952377319336
2018	34.761905670166
2019	35.238094329834
2020	35.7142868041992
2021	35.238094329834
2022	28.301887512207