Year % 1983 14.722841167250126 1984 17.661402000204106 1985 21.502227206363923 1986 25.392713276567026 1987 28.016672551503863 1988 33.69723635765788 1989 40.67922346549207 1990 45.95704686707764 1991 45.991487180838135 1992 47.06391077240308 1993 48.93562631689563 1994 51.03410325062904 1995 54.048511760586706 1996 53.27061136702412 1997 55.747513478793 1998 56.4667989854112 1999 57.924108803269334 2000 60.57056440572292 2001 62.51366513399199 2002 67.45548378482117 2003 70.10777983722397 2004 74.53326583651226 2005 76.4594315041909 2006 77.90942927183673 2007 79.05172783942714 2008 81.12906870754837 2009 85.40371839840734 2010 82.51787017170389 2011 80.28254972093046 2012 77.7775669625997 2013 79.02094227426319 2014 81.71463272321539 2015 82.4805653904213 2016 82.51448798387456 2017 85.14411495711484 2018 85.15877612771081 2019 85.16146390951654 2020 84.61422924656327 2021 83.75576629604468 2022 82.37150188805494