Year	Number
1996	51.7587928771973
1998	47.5
2000	49.7512435913086
2002	53.7313423156738
2003	51.7412948608398
2004	52.8846168518066
2005	54.0669860839844
2006	46.8899536132813
2007	47.8468894958496
2008	51.4423065185547
2009	52.6066360473633
2010	50.2369651794434
2011	38.9671363830566
2012	37.0892028808594
2013	27.6995296478271
2014	27.884614944458
2015	30.9523811340332
2016	34.2857131958008
2017	35.238094329834
2018	43.3333320617676
2019	42.8571434020996
2020	41.4285697937012
2021	43.8095245361328
2022	42.4528312683105