Year	Number
1996	17.021276473999
1998	3.72340416908264
2000	7.93650770187378
2002	29.100528717041
2003	28.1407032012939
2004	28.6407775878906
2005	24.7572822570801
2006	28.5024147033691
2007	26.0869560241699
2008	27.4038467407227
2009	29.3838863372803
2010	31.2796211242676
2011	36.9668235778809
2012	38.8625602722168
2013	43.1279602050781
2014	53.3333320617676
2015	55.238094329834
2016	50.476188659668
2017	50.476188659668
2018	46.698112487793
2019	44.3396224975586
2020	41.9811325073242
2021	45.2830200195313
2022	40.0943412780762