Year % of total population 1960 94.865 1961 94.722 1962 94.502 1963 94.273 1964 94.036 1965 93.789 1966 93.533 1967 93.267 1968 92.991 1969 92.704 1970 92.407 1971 92.099 1972 91.779 1973 91.447 1974 90.966 1975 90.164 1976 89.299 1977 88.37 1978 87.371 1979 86.299 1980 85.149 1981 84.199 1982 83.788 1983 83.369 1984 82.94 1985 82.504 1986 82.059 1987 81.605 1988 81.14099999999999 1989 80.67 1990 80.189 1991 79.743 1992 79.39 1993 79.03399999999999 1994 78.672 1995 78.307 1996 77.936 1997 77.562 1998 77.182 1999 76.798 2000 76.41 2001 75.904 2002 75.244 2003 74.571 2004 73.886 2005 73.191 2006 72.483 2007 71.763 2008 71.032 2009 70.291 2010 69.538 2011 68.775 2012 68.007 2013 67.238 2014 66.465 2015 65.69200000000001 2016 64.917 2017 64.142 2018 63.368 2019 62.595 2020 61.823 2021 61.054 2022 60.289 2023 59.527