Year Percent 1950 26.50318 1955 27.26748 1960 26.70071 1965 25.95989 1970 24.48391 1975 23.22486 1980 22.96093 1985 22.52023 1990 23.66244 1995 24.3482 2000 25.41049 2005 26.80796 2010 26.82014 2015 26.77868 2020 26.20057 2025 25.39123 2030 24.91139 2035 24.86624 2040 24.56926 2045 23.70836 2050 23.24908 2055 23.19391 2060 23.51198 2065 23.97564 2070 23.7484 2075 23.28315 2080 22.8928 2085 22.70682 2090 22.72251 2095 22.75693 2100 22.63175