Year	Number
1996	66.331657409668
1998	64.5
2000	62.6865653991699
2002	57.7114410400391
2003	63.1840782165527
2004	58.6538467407227
2005	57.4162673950195
2006	57.8947372436523
2007	52.1531105041504
2008	48.0769233703613
2009	54.9763031005859
2010	60.1895751953125
2011	52.1126747131348
2012	52.1126747131348
2013	53.9906120300293
2014	60.5769233703613
2015	53.3333320617676
2016	55.238094329834
2017	51.9047622680664
2018	49.523811340332
2019	48.5714302062988
2020	47.1428565979004
2021	46.1904754638672
2022	44.3396224975586