Year	Number
1996	27.4193553924561
1998	27.807487487793
2000	30.319149017334
2002	32.8042335510254
2003	30.1587295532227
2004	29.5566501617432
2005	23.4146347045898
2006	28.2926826477051
2007	27.6699028015137
2008	20.8737869262695
2009	21.0526313781738
2010	29.5238094329834
2011	24.1706161499023
2012	19.4312801361084
2013	21.8009471893311
2014	27.4038467407227
2015	22.8571434020996
2016	27.619047164917
2017	24.2857151031494
2018	28.5714282989502
2019	30.9523811340332
2020	28.0952377319336
2021	34.2857131958008
2022	34.4339637756348