Year	Number
1996	25.6281414031982
1998	31
2000	22.8855724334717
2002	28.3582096099854
2003	27.8606967926025
2004	29.8076915740967
2005	33.0143547058105
2006	39.2344512939453
2007	41.1483268737793
2008	42.3076934814453
2009	43.1279602050781
2010	46.9194297790527
2011	49.2957763671875
2012	45.5399055480957
2013	42.7230033874512
2014	45.6730766296387
2015	46.1904754638672
2016	45.238094329834
2017	39.523811340332
2018	39.0476188659668
2019	40
2020	33.8095245361328
2021	34.761905670166
2022	38.6792449951172