Year	Number
1996	49.4623641967773
1998	52.9411773681641
2000	54.7872352600098
2002	51.8518524169922
2003	47.6190490722656
2004	47.7832527160645
2005	50.2439041137695
2006	27.8048782348633
2007	30.0970878601074
2008	33.980583190918
2009	33.4928245544434
2010	30
2011	28.4360198974609
2012	31.2796211242676
2013	28.9099521636963
2014	23.5576915740967
2015	29.5238094329834
2016	25.7142848968506
2017	21.4285717010498
2018	17.619047164917
2019	17.1428565979004
2020	18.5714282989502
2021	18.0952377319336
2022	21.2264156341553