Year	Number
1996	57.9234962463379
1998	56.8306007385254
2000	50.8196716308594
2002	47.027027130127
2003	45.9459457397461
2004	39.3034820556641
2005	38.235294342041
2006	37.5609741210938
2007	38.3495140075684
2008	40.7766990661621
2009	49.7607650756836
2010	42.5837326049805
2011	45.0236968994141
2012	45.497631072998
2013	52.6066360473633
2014	52.4038467407227
2015	42.3809509277344
2016	38.5714302062988
2017	43.3333320617676
2018	47.1428565979004
2019	49.0476188659668
2020	50
2021	51.4285697937012
2022	58.9622650146484