Year % of total population 1960 96.404 1961 96.208 1962 96.001 1963 95.783 1964 95.554 1965 95.313 1966 95.06 1967 94.793 1968 94.513 1969 94.219 1970 93.911 1971 93.587 1972 93.246 1973 92.89 1974 92.516 1975 92.124 1976 91.712 1977 91.283 1978 90.832 1979 90.361 1980 89.868 1981 89.354 1982 88.816 1983 88.255 1984 87.668 1985 87.059 1986 86.423 1987 85.76 1988 85.071 1989 84.355 1990 83.612 1991 82.839 1992 82.038 1993 81.209 1994 80.351 1995 79.463 1996 78.544 1997 77.599 1998 76.623 1999 75.617 2000 74.582 2001 73.52 2002 72.43 2003 71.312 2004 70.16499999999999 2005 69.035 2006 68.288 2007 67.531 2008 66.76400000000001 2009 65.99000000000001 2010 65.207 2011 64.41499999999999 2012 63.629 2013 62.851 2014 62.082 2015 61.322 2016 60.572 2017 59.833 2018 59.105 2019 58.388 2020 57.684 2021 56.992 2022 56.314 2023 55.65