Year	Number
1996	19.3548393249512
1998	14.9732618331909
2000	14.361701965332
2002	38.0952377319336
2003	35.9788360595703
2004	29.5566501617432
2005	44.8780479431152
2006	39.5121955871582
2007	37.8640785217285
2008	36.4077682495117
2009	32.0574150085449
2010	29.0476188659668
2011	24.1706161499023
2012	19.4312801361084
2013	16.1137447357178
2014	13.4615383148193
2015	11.9047622680664
2016	11.9047622680664
2017	9.5238094329834
2018	10.4761905670166
2019	9.5238094329834
2020	10.4761905670166
2021	10.9523811340332
2022	8.01886749267578