Year	Percent
1950	15.58661
1955	15.72071
1960	15.80486
1965	15.79716
1970	15.63321
1975	15.24328
1980	14.87031
1985	14.40363
1990	13.73418
1995	13.99367
2000	14.16576
2005	14.92918
2010	15.97452
2015	17.01862
2020	18.29985
2025	19.65316
2030	21.37431
2035	23.59948
2040	26.59195
2045	29.23297
2050	30.61664
2055	30.28333
2060	29.00104
2065	27.6215
2070	26.6346
2075	26.20275
2080	25.43722
2085	24.56559
2090	23.85499
2095	23.46829
2100	23.28651