Year	Number
1996	30.6532669067383
1998	30
2000	23.8805961608887
2002	22.8855724334717
2003	25.3731346130371
2004	39.9038467407227
2005	33.9712905883789
2006	24.8803825378418
2007	29.6650714874268
2008	34.6153831481934
2009	35.5450248718262
2010	35.5450248718262
2011	37.5586853027344
2012	40.3755874633789
2013	41.3145523071289
2014	44.711540222168
2015	37.6190490722656
2016	30
2017	31.4285717010498
2018	31.9047622680664
2019	31.4285717010498
2020	40.9523811340332
2021	40.9523811340332
2022	40.0943412780762