Year	Percent
1950	14.66206
1955	14.08222
1960	12.99701
1965	12.76139
1970	12.32825
1975	11.89663
1980	11.52254
1985	10.97725
1990	10.91568
1995	11.48063
2000	12.36794
2005	13.53225
2010	15.0159
2015	16.54967
2020	18.34888
2025	20.28851
2030	22.12824
2035	24.01231
2040	25.54466
2045	26.61663
2050	26.98272
2055	26.55027
2060	25.99718
2065	25.44059
2070	25.11428
2075	24.99394
2080	24.67158
2085	24.2216
2090	23.75813
2095	23.39047
2100	23.12101