Year	Number
1996	25.543478012085
1998	26.6304340362549
2000	26.6304340362549
2002	28.6486492156982
2003	34.5945930480957
2004	30.348258972168
2005	42.1568641662598
2006	34.3137245178223
2007	30.5825233459473
2008	26.6990299224854
2009	29.6650714874268
2010	29.6650714874268
2011	27.962085723877
2012	25.1184825897217
2013	27.488151550293
2014	28.365385055542
2015	33.8095245361328
2016	28.0952377319336
2017	30.4761905670166
2018	29.0476188659668
2019	21.4285717010498
2020	25.238094329834
2021	24.761905670166
2022	21.2264156341553