Year	Percent
1950	14.88432
1955	15.33365
1960	15.10134
1965	14.70919
1970	14.57473
1975	14.69917
1980	15.09432
1985	15.21058
1990	15.056
1995	15.56484
2000	17.00707
2005	18.83129
2010	20.98877
2015	22.87918
2020	24.08756
2025	25.05227
2030	25.38525
2035	25.44906
2040	25.47872
2045	25.6199
2050	25.89027
2055	26.42868
2060	26.72412
2065	26.6226
2070	26.46195
2075	26.04718
2080	25.80537
2085	25.65573
2090	25.50597
2095	25.28324
2100	25.0014