Year	Number
1996	48.924732208252
1998	43.3155097961426
2000	45.2127647399902
2002	47.0899467468262
2003	42.8571434020996
2004	41.8719215393066
2005	51.2195129394531
2006	48.7804870605469
2007	52.4271850585938
2008	48.5436897277832
2009	40.6698570251465
2010	40.9523811340332
2011	42.1800956726074
2012	32.7014236450195
2013	35.5450248718262
2014	36.0576934814453
2015	39.0476188659668
2016	40
2017	40.9523811340332
2018	37.1428565979004
2019	36.1904754638672
2020	31.9047622680664
2021	29.0476188659668
2022	27.8301887512207