Year	Number
1996	3.82513666152954
1998	4.37158489227295
2000	3.27868843078613
2002	6.48648643493652
2003	4.32432413101196
2004	7.96019887924194
2005	8.82352924346924
2006	11.2195119857788
2007	15.5339803695679
2008	13.1067962646484
2009	12.4401912689209
2010	10.0478467941284
2011	16.5876770019531
2012	23.6966819763184
2013	23.6966819763184
2014	19.7115383148193
2015	18.0952377319336
2016	14.2857141494751
2017	15.2380952835083
2018	16.1904754638672
2019	13.3333330154419
2020	11.4285717010498
2021	11.4285717010498
2022	14.1509437561035