Year	Number
1996	24.0437164306641
1998	27.8688526153564
2000	30.6010932922363
2002	32.4324340820313
2003	39.4594612121582
2004	42.7860679626465
2005	39.705883026123
2006	48.2926826477051
2007	47.0873794555664
2008	49.029125213623
2009	54.0669860839844
2010	55.9808616638184
2011	51.6587677001953
2012	51.6587677001953
2013	50.7108993530273
2014	54.8076934814453
2015	44.761905670166
2016	38.5714302062988
2017	37.6190490722656
2018	35.238094329834
2019	34.2857131958008
2020	42.8571434020996
2021	38.0952377319336
2022	38.6792449951172