Year	Number
1996	6.38297891616821
1998	0
2000	1.05820107460022
2002	19.0476188659668
2003	19.0954780578613
2004	18.9320392608643
2005	13.5922327041626
2006	17.3913040161133
2007	16.9082126617432
2008	15.865385055542
2009	19.9052124023438
2010	21.3270149230957
2011	25.5924167633057
2012	26.5402851104736
2013	30.3317527770996
2014	40.476188659668
2015	42.3809509277344
2016	38.0952377319336
2017	35.238094329834
2018	34.9056587219238
2019	27.8301887512207
2020	25.943395614624
2021	29.2452831268311
2022	24.5283012390137