Year	Number
1996	19.0954780578613
1998	21.5
2000	21.8905467987061
2002	19.4029846191406
2003	23.8805961608887
2004	20.1923084259033
2005	21.0526313781738
2006	30.6220092773438
2007	30.6220092773438
2008	26.9230766296387
2009	22.748815536499
2010	25.5924167633057
2011	27.2300472259521
2012	30.5164318084717
2013	32.8638496398926
2014	37.5
2015	35.238094329834
2016	33.3333320617676
2017	33.3333320617676
2018	35.7142868041992
2019	33.8095245361328
2020	38.0952377319336
2021	29.0476188659668
2022	26.4150943756104