Year	Number
1996	31.9148941040039
1998	42.5531921386719
2000	34.3915328979492
2002	47.0899467468262
2003	42.7135696411133
2004	49.029125213623
2005	49.5145645141602
2006	49.2753639221191
2007	45.4106292724609
2008	42.3076934814453
2009	46.445499420166
2010	47.8672981262207
2011	42.6540298461914
2012	44.5497627258301
2013	38.8625602722168
2014	50
2015	48.0952377319336
2016	41.9047622680664
2017	37.1428565979004
2018	30.6603775024414
2019	35.8490562438965
2020	43.8679237365723
2021	43.8679237365723
2022	41.5094337463379