Year	Number
1996	15.8469944000244
1998	20.7650279998779
2000	20.7650279998779
2002	23.7837829589844
2003	26.4864864349365
2004	25.8706474304199
2005	22.0588226318359
2006	21.9512195587158
2007	24.2718448638916
2008	16.990291595459
2009	18.6602878570557
2010	22.4880390167236
2011	20.8530807495117
2012	21.3270149230957
2013	20.8530807495117
2014	19.7115383148193
2015	19.5238094329834
2016	18.5714282989502
2017	18.5714282989502
2018	15.2380952835083
2019	15.2380952835083
2020	16.6666660308838
2021	15.2380952835083
2022	15.5660381317139