Year	%
1990	27.0408163265306
1991	28
1992	28.6245353159851
1993	29.2035398230089
1994	29.8440979955457
1995	30.6451612903226
1996	31.3860252004582
1997	31.9306930693069
1998	32.4620060790273
1999	32.7038231229848
2000	32.9259525521208
2001	33.0990041007616
2002	33.2756061355765
2003	33.4188582424631
2004	33.453853472883
2005	33.5065835065835
2006	33.5532668168651
2007	33.5608128601759
2008	33.5551055828753
2009	33.6362365441074
2010	33.6001085187195
2011	33.4701986754967
2012	33.3246921581335
2013	33.189491052164
2014	33.1471829238024
2015	33.200290275762
2016	33.294034425843
2017	33.4096371752318
2018	33.5246715973065
2019	33.6307626938602
2020	33.7671654027465
2021	33.8914206459283
2022	33.9606419564387