Year	Number
1996	30
1998	27.8606967926025
2000	25.3731346130371
2002	15.9203977584839
2003	23.3830852508545
2004	21.634614944458
2005	21.634614944458
2006	20.6730766296387
2007	25
2008	25.480770111084
2009	27.014217376709
2010	27.962085723877
2011	27.6995296478271
2012	24.8826293945313
2013	26.7605628967285
2014	30.5418720245361
2015	30.5418720245361
2016	34.4827575683594
2017	33.9901466369629
2018	30.5825233459473
2019	30.917875289917
2020	32.8502426147461
2021	31.8840579986572
2022	32.3671493530273