Year	Number
1998	1
2000	27.8606967926025
2002	22.8855724334717
2003	25.3731346130371
2004	26.9230766296387
2005	31.1004791259766
2006	30.6220092773438
2007	34.9282302856445
2008	41.3461532592773
2009	45.497631072998
2010	45.0236968994141
2011	46.478874206543
2012	46.0093879699707
2013	46.0093879699707
2014	45.6730766296387
2015	44.761905670166
2016	35.7142868041992
2017	39.0476188659668
2018	44.2857131958008
2019	44.2857131958008
2020	42.8571434020996
2021	40.9523811340332
2022	38.6792449951172