Year Percent 1950 10.08676 1955 10.14201 1960 10.9849 1965 11.84966 1970 12.19736 1975 13.16201 1980 13.44912 1985 12.69638 1990 15.68655 1995 16.02325 2000 16.98026 2005 17.27202 2010 18.98832 2015 21.44155 2020 24.60451 2025 27.67857 2030 29.74212 2035 31.52828 2040 32.38985 2045 33.17551 2050 33.42399 2055 33.66645 2060 33.73634 2065 33.95196 2070 34.20479 2075 34.54203 2080 34.88586 2085 35.21638 2090 35.54764 2095 35.87056 2100 36.2024