Year	Number
1996	36.5
1998	42.7860679626465
2000	34.3283576965332
2002	34.825870513916
2003	26.8656711578369
2004	33.6538467407227
2005	26.4423084259033
2006	28.8461532592773
2007	27.884614944458
2008	25.9615383148193
2009	27.962085723877
2010	28.9099521636963
2011	27.6995296478271
2012	29.1079807281494
2013	27.2300472259521
2014	27.5862064361572
2015	28.5714282989502
2016	29.5566501617432
2017	28.5714282989502
2018	29.1262130737305
2019	29.468599319458
2020	30.917875289917
2021	31.8840579986572
2022	32.8502426147461