Year	Number
1996	27.3224048614502
1998	25.1366119384766
2000	23.4972686767578
2002	37.8378372192383
2003	31.8918914794922
2004	22.8855724334717
2005	30.3921566009521
2006	24.8780479431152
2007	17.9611644744873
2008	19.4174766540527
2009	15.7894735336304
2010	21.0526313781738
2011	19.4312801361084
2012	18.9573459625244
2013	21.8009471893311
2014	21.1538467407227
2015	21.4285717010498
2016	36.6666679382324
2017	30.4761905670166
2018	32.3809509277344
2019	31.9047622680664
2020	19.5238094329834
2021	16.1904754638672
2022	21.2264156341553