Year	%
1990	21.4250124564026
1991	22.1729490022173
1992	22.8571428571429
1993	23.5031610264039
1994	24.0559440559441
1995	24.5989304812834
1996	25.0405449237755
1997	25.3410124280085
1998	25.529511437447
1999	25.7029177718833
2000	25.8218318695107
2001	25.9020310633214
2002	25.9835315645014
2003	26.0611392126677
2004	26.1146496815287
2005	26.1620732208968
2006	26.1790567545963
2007	26.1765849863866
2008	26.1395876678646
2009	26.0741828865222
2010	26.0024950989128
2011	25.9432329525788
2012	25.8791855965001
2013	25.8318308474021
2014	25.776
2015	25.7317264047582
2016	25.713847098557
2017	25.7095410628019
2018	25.7147111375819
2019	25.7290132547865
2020	25.7414170927684
2021	25.7853403141361
2022	25.8307937890002