Year	Number
1996	60.8040199279785
1998	55
2000	51.243782043457
2002	49.7512435913086
2003	48.2587051391602
2004	45.1923065185547
2005	43.0622024536133
2006	45.9330139160156
2007	48.8038291931152
2008	45.6730766296387
2009	45.497631072998
2010	47.3933639526367
2011	47.8873252868652
2012	47.417839050293
2013	46.0093879699707
2014	42.788459777832
2015	45.238094329834
2016	52.8571434020996
2017	52.8571434020996
2018	50.476188659668
2019	48.5714302062988
2020	47.1428565979004
2021	47.6190490722656
2022	52.8301887512207