Year % of total population 1960 46.84632067357014 1961 47.01592217863291 1962 47.14810906354019 1963 47.23451273639463 1964 47.25283878741188 1965 47.24869094671114 1966 47.2122661214335 1967 47.124961788662524 1968 46.998923769263925 1969 46.80691552951027 1970 46.55623821119416 1971 46.30758180553764 1972 46.040959124178336 1973 45.70950278511132 1974 45.334766533448686 1975 44.94098388606235 1976 44.55008933220326 1977 44.164658832056446 1978 43.79662448957714 1979 43.46308674861706 1980 43.16227142752068 1981 42.88812081404939 1982 42.62868294043189 1983 42.38475470895086 1984 42.166630560488734 1985 41.977517655175355 1986 41.831458720865065 1987 41.73426921551086 1988 41.67159072045133 1989 41.614432764240725 1990 41.530061839371776 1991 41.42119854066499 1992 41.28283149529156 1993 41.09967554776141 1994 40.87116777417172 1995 40.60391613204627 1996 40.29937816333849 1997 39.938526429736925 1998 39.54490862625057 1999 39.146169165521485 2000 38.752419734422055 2001 38.39866363922036 2002 38.06562870658232 2003 37.732839567959566 2004 37.41236429433977 2005 37.09878571805903 2006 36.78737693439267 2007 36.49094398412513 2008 36.24157306815375 2009 36.03633155603125 2010 35.860738082489796 2011 35.72033590649649 2012 35.606874614691115 2013 35.5121864035542 2014 35.433356687340925 2015 35.359613318453526 2016 35.28036896827193 2017 35.18531439779383 2018 35.066166861226684 2019 34.924864438348656 2020 34.7536971209262 2021 34.54435222428481 2022 34.32573292686261 2023 34.096228946601265