Year	Number
1996	22.1105518341064
1998	27
2000	30.348258972168
2002	25.3731346130371
2003	34.3283576965332
2004	34.6153831481934
2005	31.1004791259766
2006	25.8373203277588
2007	29.6650714874268
2008	35.5769233703613
2009	30.3317527770996
2010	27.014217376709
2011	23.474178314209
2012	28.6384983062744
2013	15.023473739624
2014	11.057692527771
2015	8.09523773193359
2016	8.09523773193359
2017	7.61904764175415
2018	6.66666650772095
2019	5.2380952835083
2020	4.7619047164917
2021	5.2380952835083
2022	5.66037750244141