Year	Number
1996	43.5
1998	27.8606967926025
2000	19.9004974365234
2002	41.2935333251953
2003	44.7761192321777
2004	46.6346168518066
2005	40.3846168518066
2006	42.3076934814453
2007	46.1538467407227
2008	49.519229888916
2009	45.497631072998
2010	48.8151664733887
2011	48.3568077087402
2012	43.6619720458984
2013	42.7230033874512
2014	45.8128089904785
2015	44.3349761962891
2016	47.7832527160645
2017	46.305419921875
2018	47.5728149414063
2019	49.2753639221191
2020	52.1739120483398
2021	51.6908226013184
2022	50.2415466308594