Year % (cumulative) 1990 12.5365695953369 1991 12.8372888565063 1992 13.5635137557983 1993 14.3576068878174 1994 14.9284429550171 1995 15.1022348403931 1996 15.3997430801392 1997 15.9124097824097 1998 16.242992401123 1999 16.9841461181641 2000 17.751781463623 2001 18.2979965209961 2002 18.7955856323242 2003 19.6852111816406 2004 19.7800674438477 2005 20.6966361999512 2006 21.4788188934326 2007 21.9738655090332 2008 22.4235858917236 2009 22.6831531524658 2010 23.551887512207 2011 24.0642337799072 2012 24.7599868774414 2013 25.3839149475098 2014 25.6870307922363 2015 26.577808380127 2016 25.7544403076172 2017 27.9425659179688 2018 28.5200099945068 2019 29.7712154388428 2020 30.970832824707 2021 29.3322296142578 2022 32.3500862121582 2023 32.88818359375