Year	Number
1996	15.8469944000244
1998	16.9398899078369
2000	16.3934421539307
2002	18.3783779144287
2003	25.4054050445557
2004	25.3731346130371
2005	26.470588684082
2006	35.6097564697266
2007	30.5825233459473
2008	33.980583190918
2009	40.6698570251465
2010	41.1483268737793
2011	40.2843589782715
2012	38.3886260986328
2013	37.4407577514648
2014	40.3846168518066
2015	29.5238094329834
2016	27.1428565979004
2017	23.3333339691162
2018	18.0952377319336
2019	15.7142858505249
2020	27.619047164917
2021	25.238094329834
2022	24.056604385376