Year	%
1990	38.0200860832138
1991	38.1127450980392
1992	38.2571732199788
1993	38.4245917387128
1994	38.6443661971831
1995	38.9568052159739
1996	39.3292682926829
1997	39.7270114942529
1998	40.1907356948229
1999	40.6514657980456
2000	40.8163265306122
2001	40.9904534606205
2002	41.1900635470826
2003	41.4743950478334
2004	41.7853231106243
2005	42.0212765957447
2006	42.2520661157025
2007	42.4075924075924
2008	42.5747348119576
2009	42.7906976744186
2010	43.4316353887399
2011	44.1252144082333
2012	44.9239621866009
2013	45.6872784560851
2014	46.4353074311581
2015	47.2865412445731
2016	48.2960413080895
2017	49.2915980230643
2018	50.1585288522511
2019	50.9335782063055
2020	51.6607354685647
2021	52.338337182448
2022	52.8913963328632