Year % of total population ages 15+ (modeled ILO estimate) 1991 56.53 1992 55.19 1993 55.81 1994 56.46 1995 56.61 1996 57.41 1997 58.1 1998 60.07 1999 61.63 2000 62.53 2001 62.44 2002 62.58 2003 62.79 2004 63.07 2005 65.11 2006 65.86 2007 66.62 2008 65.94 2009 64.09 2010 62.6 2011 61.96 2012 61.64 2013 61.96 2014 61.75 2015 61.82 2016 62.18 2017 61.98 2018 62.16 2019 62.34 2020 61.12 2021 63.3 2022 64.84 2023 65.048