Year	Number
1996	29.3478260040283
1998	27.7173919677734
2000	22.2826080322266
2002	31.3513507843018
2003	22.1621627807617
2004	21.3930339813232
2005	21.0784320831299
2006	23.529411315918
2007	28.1553401947021
2008	35.9223289489746
2009	36.8421058654785
2010	39.7129173278809
2011	40.2843589782715
2012	44.0758285522461
2013	45.0236968994141
2014	48.0769233703613
2015	45.7142868041992
2016	44.2857131958008
2017	43.3333320617676
2018	49.523811340332
2019	48.0952377319336
2020	45.7142868041992
2021	44.761905670166
2022	45.2830200195313