Year	Number
1996	35.638298034668
1998	28.7234039306641
2000	29.6296291351318
2002	33.862434387207
2003	36.1809043884277
2004	30.0970878601074
2005	29.6116504669189
2006	29.9516906738281
2007	37.6811599731445
2008	43.269229888916
2009	42.1800956726074
2010	38.3886260986328
2011	37.4407577514648
2012	40.2843589782715
2013	49.2891006469727
2014	61.4285697937012
2015	58.0952377319336
2016	57.6190490722656
2017	59.523811340332
2018	58.4905662536621
2019	51.886791229248
2020	50
2021	52.3584899902344
2022	50.4716987609863