Year	Number
1996	20.7650279998779
1998	40.9836082458496
2000	39.3442611694336
2002	34.0540542602539
2003	45.9459457397461
2004	35.8208961486816
2005	26.9607849121094
2006	18.536584854126
2007	16.990291595459
2008	20.3883495330811
2009	26.7942581176758
2010	24.4019145965576
2011	22.748815536499
2012	18.4834117889404
2013	20.3791465759277
2014	16.8269233703613
2015	18.0952377319336
2016	21.9047622680664
2017	20.4761905670166
2018	22.8571434020996
2019	32.8571434020996
2020	28.0952377319336
2021	30.9523811340332
2022	29.7169818878174