Year	Number
1996	36.0215072631836
1998	43.8502655029297
2000	54.7872352600098
2002	47.6190490722656
2003	48.6772499084473
2004	41.8719215393066
2005	45.8536567687988
2006	43.9024391174316
2007	45.6310691833496
2008	45.6310691833496
2009	44.4976081848145
2010	40.476188659668
2011	39.3364944458008
2012	37.9146919250488
2013	34.5971565246582
2014	22.115385055542
2015	19.5238094329834
2016	20.4761905670166
2017	16.1904754638672
2018	16.6666660308838
2019	18.0952377319336
2020	19.5238094329834
2021	17.619047164917
2022	17.4528293609619