Year	Number
1996	20.5
1998	17.412935256958
2000	43.2835807800293
2002	41.7910461425781
2003	40.7960205078125
2004	40.3846168518066
2005	45.6730766296387
2006	45.1923065185547
2007	46.6346168518066
2008	47.1153831481934
2009	47.8672981262207
2010	48.3412322998047
2011	48.8262901306152
2012	52.582160949707
2013	50.2347412109375
2014	51.7241363525391
2015	53.694580078125
2016	51.7241363525391
2017	51.2315254211426
2018	51.9417457580566
2019	51.6908226013184
2020	52.1739120483398
2021	52.6570053100586
2022	52.6570053100586