Year	Number
1996	26.6304340362549
1998	28.2608699798584
2000	27.1739139556885
2002	26.4864864349365
2003	31.8918914794922
2004	25.8706474304199
2005	32.8431358337402
2006	31.8627452850342
2007	27.6699028015137
2008	32.5242729187012
2009	29.6650714874268
2010	27.2727279663086
2011	31.2796211242676
2012	34.1232223510742
2013	36.0189590454102
2014	28.8461532592773
2015	29.0476188659668
2016	27.619047164917
2017	30
2018	27.1428565979004
2019	26.6666660308838
2020	22.380952835083
2021	25.238094329834
2022	21.2264156341553