Year	Number
1996	4.83870983123779
1998	5.34759378433228
2000	4.25531911849976
2002	3.17460322380066
2003	5.29100513458252
2004	9.35960578918457
2005	2.43902444839478
2006	5.36585378646851
2007	6.7961163520813
2008	4.36893224716187
2009	5.74162673950195
2010	14.2857141494751
2011	12.3222751617432
2012	10.4265403747559
2013	11.8483409881592
2014	11.057692527771
2015	13.8095235824585
2016	12.8571424484253
2017	21.9047622680664
2018	26.1904754638672
2019	26.6666660308838
2020	28.5714282989502
2021	27.1428565979004
2022	22.1698112487793