Year	Number
1996	35.8695640563965
1998	30.9782600402832
2000	25.543478012085
2002	30.8108100891113
2003	38.9189186096191
2004	31.343282699585
2005	31.8627452850342
2006	32.3529396057129
2007	28.6407775878906
2008	28.1553401947021
2009	25.3588523864746
2010	23.9234447479248
2011	25.5924167633057
2012	23.6966819763184
2013	22.274881362915
2014	22.115385055542
2015	23.8095245361328
2016	22.8571434020996
2017	25.238094329834
2018	23.3333339691162
2019	24.2857151031494
2020	25.7142848968506
2021	28.5714282989502
2022	27.8301887512207