Year	Percent
1950	16.19016
1955	15.54592
1960	15.12095
1965	15.23098
1970	14.91885
1975	14.47556
1980	13.71948
1985	13.11742
1990	13.34024
1995	13.56963
2000	14.03806
2005	14.75118
2010	14.81061
2015	13.61257
2020	13.49836
2025	14.92785
2030	17.10056
2035	19.43469
2040	21.38153
2045	22.1407
2050	22.5435
2055	23.34287
2060	24.09651
2065	24.93309
2070	25.49301
2075	25.49031
2080	25.33475
2085	25.24903
2090	25.2443
2095	25.20105
2100	25.06367