Year	Percent
1950	14.2328
1955	15.04039
1960	15.51061
1965	15.5636
1970	15.18231
1975	14.52809
1980	13.80365
1985	13.1569
1990	12.56814
1995	12.20573
2000	12.02733
2005	11.97337
2010	12.11843
2015	12.34713
2020	12.81973
2025	13.42166
2030	13.9786
2035	14.6164
2040	15.32587
2045	16.21842
2050	17.37755
2055	18.52202
2060	19.55634
2065	20.44522
2070	21.18808
2075	21.89631
2080	22.56022
2085	23.12885
2090	23.56858
2095	23.90344
2100	24.15362