Year	Number
1996	39
1998	37.3134346008301
2000	39.3034820556641
2002	28.8557205200195
2003	33.3333320617676
2004	36.538459777832
2005	40.3846168518066
2006	33.6538467407227
2007	33.6538467407227
2008	34.1346168518066
2009	35.5450248718262
2010	36.0189590454102
2011	34.7417831420898
2012	35.2112693786621
2013	35.2112693786621
2014	33.4975357055664
2015	31.0344829559326
2016	32.019702911377
2017	31.5270938873291
2018	31.5533981323242
2019	31.8840579986572
2020	32.8502426147461
2021	30.917875289917
2022	30.917875289917