Year	Number
1996	55.5
1998	53.233829498291
2000	53.7313423156738
2002	51.7412948608398
2003	47.2636833190918
2004	52.4038467407227
2005	55.288459777832
2006	34.1346168518066
2007	35.5769233703613
2008	35.0961532592773
2009	40.7582931518555
2010	40.2843589782715
2011	45.0704231262207
2012	51.6431922912598
2013	50.7042236328125
2014	45.8128089904785
2015	41.3793106079102
2016	40.8866996765137
2017	41.3793106079102
2018	41.262134552002
2019	39.1304359436035
2020	38.164249420166
2021	40.5797119140625
2022	44.4444427490234