Year	Percent
1950	15.60513
1955	15.59598
1960	15.2437
1965	14.81792
1970	14.31018
1975	13.75045
1980	13.18936
1985	12.7703
1990	12.48284
1995	12.39774
2000	12.40055
2005	12.58929
2010	13.30721
2015	14.1759
2020	15.11929
2025	15.63992
2030	15.60211
2035	15.29252
2040	15.2809
2045	15.84362
2050	17.05508
2055	18.39918
2060	19.2692
2065	19.84182
2070	20.25165
2075	20.72788
2080	21.3796
2085	21.96413
2090	22.37939
2095	22.66843
2100	22.93149