Year	%
1990	26.8041237113402
1991	27.0992366412214
1992	27.6353276353276
1993	27.991452991453
1994	28.3171521035599
1995	28.7914691943128
1996	29.607931500676
1997	30.1056938288442
1998	30.4460739382829
1999	30.7282166409429
2000	30.9406582016066
2001	31.1316172899466
2002	31.2649982859102
2003	31.3636852868367
2004	31.4126016260163
2005	31.4315951510487
2006	31.4484399304602
2007	31.4522459659834
2008	31.4660210385707
2009	31.4944190154983
2010	31.5282417838552
2011	31.7375217095824
2012	32.1162499077967
2013	32.5159143518518
2014	32.8786486677504
2015	33.3218184330524
2016	33.8562269813122
2017	34.3842630018863
2018	34.8710449348578
2019	35.2783059070347
2020	35.6828193832599
2021	36.0773268467546
2022	36.4347935866683