Year	%
1990	3.18493447886835
1991	4.16010085092972
1992	5.19512269657428
1993	6.21367284804871
1994	7.18024666138958
1995	8.08068751492003
1996	8.91385599135408
1997	9.68114207556847
1998	10.3864586519833
1999	11.0327170386585
2000	11.536935949984
2001	11.9450491155542
2002	12.3310002657925
2003	12.764241592313
2004	13.2144756081351
2005	13.6757634723317
2006	14.1468800049758
2007	14.621351050717
2008	15.0780852763856
2009	15.5229584668128
2010	16.0307742764219
2011	16.4971404956474
2012	16.9082819003875
2013	17.3024628014366
2014	17.7334798701381
2015	18.1519261667227
2016	18.488992457227
2017	18.8037080457825
2018	19.1321805427755
2019	19.4175791654336
2020	19.6399633622208
2021	19.8071017386532
2022	19.9194374592531