Year	%
1990	33.3333333333333
1991	40
1992	42.1052631578947
1993	40
1994	41.2698412698413
1995	41.2844036697248
1996	41.2087912087912
1997	41.8918918918919
1998	41.9148936170213
1999	42.3076923076923
2000	42.5841674249318
2001	42.7603203943315
2002	42.9426860564585
2003	43.1134083307996
2004	43.2647644326477
2005	43.4369885433715
2006	43.6749203236087
2007	43.9234808702176
2008	44.160423093874
2009	44.4097916911851
2010	44.6801346801347
2011	44.9587571073917
2012	45.2851361920631
2013	45.627096698252
2014	45.9321424905041
2015	46.1623774925873
2016	46.3652356783208
2017	46.5354676022366
2018	46.6801376039544
2019	46.8519262257098
2020	46.9951888450347
2021	47.0975699009257
2022	47.152669212435