Year	Percent
1950	15.31054
1955	15.07877
1960	14.93587
1965	14.88914
1970	14.76413
1975	14.49522
1980	14.13743
1985	13.89587
1990	13.66996
1995	13.47358
2000	13.31061
2005	13.1309
2010	13.03833
2015	13.22724
2020	13.64912
2025	14.12461
2030	14.50441
2035	14.78071
2040	15.16702
2045	15.86121
2050	16.84712
2055	18.01844
2060	19.09952
2065	20.01213
2070	20.82119
2075	21.55593
2080	22.28535
2085	22.94611
2090	23.48079
2095	23.88475
2100	24.16565