Year	Number
1996	48.0874328613281
1998	39.8907089233398
2000	38.2513656616211
2002	46.4864883422852
2003	41.0810813903809
2004	21.8905467987061
2005	22.5490188598633
2006	23.4146347045898
2007	21.3592224121094
2008	18.4466018676758
2009	24.8803825378418
2010	24.8803825378418
2011	21.8009471893311
2012	18.9573459625244
2013	21.8009471893311
2014	27.4038467407227
2015	22.380952835083
2016	20.4761905670166
2017	14.7619047164917
2018	19.0476188659668
2019	15.2380952835083
2020	15.2380952835083
2021	19.5238094329834
2022	24.5283012390137