Year % of total population 1960 95.3 1961 95.204 1962 95.107 1963 95.007 1964 94.905 1965 94.80199999999999 1966 94.697 1967 94.589 1968 94.48 1969 94.368 1970 94.254 1971 94.139 1972 94.02 1973 93.9 1974 93.778 1975 93.653 1976 93.332 1977 92.849 1978 92.332 1979 91.782 1980 91.195 1981 90.572 1982 89.909 1983 89.20400000000001 1984 88.456 1985 87.666 1986 87.168 1987 86.928 1988 86.684 1989 86.437 1990 86.185 1991 85.93 1992 85.67 1993 85.407 1994 85.14 1995 84.869 1996 84.593 1997 84.125 1998 83.49 1999 82.834 2000 82.156 2001 81.46000000000001 2002 80.742 2003 80.004 2004 79.243 2005 78.463 2006 77.661 2007 77.004 2008 76.46600000000001 2009 75.92099999999999 2010 75.367 2011 74.804 2012 74.233 2013 73.654 2014 73.066 2015 72.47 2016 71.866 2017 71.257 2018 70.642 2019 70.02 2020 69.393 2021 68.76 2022 68.123 2023 67.47999999999999