Year	Number
1996	3.51758790016174
1998	3
2000	2.98507452011108
2002	11.4427862167358
2003	11.4427862167358
2004	16.3461532592773
2005	10.5263156890869
2006	24.8803825378418
2007	26.7942581176758
2008	25.480770111084
2009	28.9099521636963
2010	30.3317527770996
2011	34.2723007202148
2012	35.2112693786621
2013	38.4976539611816
2014	43.269229888916
2015	44.761905670166
2016	36.1904754638672
2017	37.6190490722656
2018	37.1428565979004
2019	40
2020	40.476188659668
2021	40
2022	39.1509437561035