Year	Number
1996	15.3005466461182
1998	9.28961753845215
2000	14.2076501846313
2002	28.6486492156982
2003	27.5675678253174
2004	24.3781089782715
2005	27.9411773681641
2006	26.8292675018311
2007	24.2718448638916
2008	23.7864074707031
2009	24.4019145965576
2010	23.4449768066406
2011	23.6966819763184
2012	18.0094795227051
2013	20.8530807495117
2014	14.4230766296387
2015	17.619047164917
2016	14.2857141494751
2017	16.1904754638672
2018	13.8095235824585
2019	12.8571424484253
2020	11.4285717010498
2021	10.9523811340332
2022	11.3207550048828