Year	Number
1996	18
1998	32.8358192443848
2000	38.8059692382813
2002	49.2537307739258
2003	51.7412948608398
2004	52.4038467407227
2005	54.3269233703613
2006	41.8269233703613
2007	46.1538467407227
2008	46.1538467407227
2009	54.502368927002
2010	48.8151664733887
2011	49.2957763671875
2012	49.7652587890625
2013	46.948356628418
2014	49.7536964416504
2015	49.7536964416504
2016	49.2610855102539
2017	49.2610855102539
2018	50
2019	50.2415466308594
2020	50.2415466308594
2021	51.6908226013184
2022	52.6570053100586