Year	Number
1996	34.6733665466309
1998	33.5
2000	31.343282699585
2002	30.8457717895508
2003	29.8507461547852
2004	30.769229888916
2005	31.1004791259766
2006	33.9712905883789
2007	32.0574150085449
2008	29.3269233703613
2009	24.1706161499023
2010	23.222749710083
2011	24.8826293945313
2012	29.1079807281494
2013	36.1502342224121
2014	41.3461532592773
2015	34.761905670166
2016	37.1428565979004
2017	37.6190490722656
2018	40.476188659668
2019	43.3333320617676
2020	47.6190490722656
2021	49.0476188659668
2022	50.4716987609863