Year	Percent
1950	14.61799
1955	13.62318
1960	12.91836
1965	12.46384
1970	12.22963
1975	12.02276
1980	11.14491
1985	10.26978
1990	9.80136
1995	10.68723
2000	11.94824
2005	13.25099
2010	14.78652
2015	16.2463
2020	17.58922
2025	19.43101
2030	20.8964
2035	21.34649
2040	22.30298
2045	23.40123
2050	24.92054
2055	26.36639
2060	26.43651
2065	25.92284
2070	25.24331
2075	24.85536
2080	24.90984
2085	24.84765
2090	24.54301
2095	24.01218
2100	23.39576