Year	Number
1998	68.9839553833008
2000	51.5957450866699
2002	51.8518524169922
2003	42.3280410766602
2004	36.4532012939453
2005	45.365852355957
2006	40.9756088256836
2007	42.7184448242188
2008	50
2009	51.1961708068848
2010	50
2011	52.6066360473633
2012	54.502368927002
2013	48.3412322998047
2014	54.8076934814453
2015	52.8571434020996
2016	54.761905670166
2017	53.8095245361328
2018	56.1904754638672
2019	54.761905670166
2020	54.2857131958008
2021	52.8571434020996
2022	50.9433975219727