Year	Number
1996	38.7096786499023
1998	37.9679145812988
2000	40.957447052002
2002	43.9153442382813
2003	41.2698402404785
2004	43.3497543334961
2005	42.4390258789063
2006	34.634147644043
2007	36.8932037353516
2008	41.262134552002
2009	49.7607650756836
2010	48.0952377319336
2011	49.7630348205566
2012	41.2322273254395
2013	42.6540298461914
2014	36.0576934814453
2015	35.7142868041992
2016	33.8095245361328
2017	33.8095245361328
2018	30.4761905670166
2019	27.1428565979004
2020	20
2021	19.5238094329834
2022	19.8113212585449