Year	Number
1996	23.3695659637451
1998	22.8260860443115
2000	23.9130439758301
2002	18.9189186096191
2003	24.8648643493652
2004	25.3731346130371
2005	37.7450981140137
2006	29.9019603729248
2007	30.5825233459473
2008	32.5242729187012
2009	29.6650714874268
2010	28.7081336975098
2011	32.7014236450195
2012	29.8578205108643
2013	28.9099521636963
2014	28.365385055542
2015	27.1428565979004
2016	28.0952377319336
2017	32.8571434020996
2018	30.4761905670166
2019	28.5714282989502
2020	31.9047622680664
2021	26.6666660308838
2022	21.2264156341553