Year	%
1984	19.766842557369003
1985	25.098169844167327
1986	30.215882309401728
1987	34.54360775322922
1988	38.700825162727384
1989	45.99846868674691
1990	51.123902188394105
1991	48.41658903629773
1992	48.07713671665007
1993	49.690095737551005
1994	53.37071418258233
1995	54.380793206104556
1996	54.08111166724704
1997	57.14436194411309
1998	59.5377084957071
1999	59.96206578810178
2000	63.07445565246314
2001	64.43902318448248
2002	68.97060004315155
2003	70.63414507281705
2004	72.58021916127284
2005	74.34158420347273
2006	76.23787974215206
2007	77.31333920114511
2008	78.87415332029752
2009	83.6761703153247
2010	81.01717713468896
2011	78.68657197747649
2012	75.69155873092447
2013	77.29689435923594
2014	80.64395084177956
2015	81.48806809038393
2016	81.50537536498148
2017	85.86979999683074
2018	86.05089902662357
2019	85.74060590688894
2020	84.81067312264658
2021	83.23012783306432
2022	82.01195897463447