Year	Number
1996	3.51758790016174
1998	5.5
2000	2.48756217956543
2002	2.48756217956543
2003	5.97014904022217
2004	5.28846168518066
2005	6.22009563446045
2006	8.13397121429443
2007	6.22009563446045
2008	7.21153831481934
2009	9.47867298126221
2010	8.05687236785889
2011	8.92018795013428
2012	7.51173686981201
2013	7.51173686981201
2014	11.5384616851807
2015	12.8571424484253
2016	16.1904754638672
2017	14.7619047164917
2018	16.6666660308838
2019	15.2380952835083
2020	18.0952377319336
2021	17.1428565979004
2022	16.0377349853516