Year	Percent
1950	13.52431
1955	13.89129
1960	14.2466
1965	14.85828
1970	15.5432
1975	15.87495
1980	15.68631
1985	15.31033
1990	16.93129
1995	17.04638
2000	17.5456
2005	18.82534
2010	20.28756
2015	21.91484
2020	24.11538
2025	27.07858
2030	29.64724
2035	31.00985
2040	32.16513
2045	33.17773
2050	33.91348
2055	34.39019
2060	34.71719
2065	34.70057
2070	34.95715
2075	35.21382
2080	35.47505
2085	35.79525
2090	36.19386
2095	36.63813
2100	37.10386