Year	Number
1996	15.5778894424438
1998	8
2000	23.8805961608887
2002	32.3383102416992
2003	25.3731346130371
2004	21.634614944458
2005	21.0526313781738
2006	20.0956935882568
2007	15.7894735336304
2008	12.9807691574097
2009	15.1658763885498
2010	14.2180099487305
2011	15.4929580688477
2012	8.45070457458496
2013	6.57277011871338
2014	12.9807691574097
2015	13.3333330154419
2016	10.4761905670166
2017	11.9047622680664
2018	18.5714282989502
2019	18.0952377319336
2020	16.1904754638672
2021	14.2857141494751
2022	13.2075471878052