Year	Percent
1950	14.67571
1955	13.57209
1960	13.08946
1965	12.69221
1970	13.60534
1975	15.19044
1980	14.85262
1985	16.4605
1990	21.8017
1995	22.4871
2000	28.45606
2005	29.5096
2010	25.33769
2015	24.4171
2020	25.55304
2025	26.57121
2030	28.1021
2035	30.63147
2040	32.99272
2045	35.17873
2050	35.66071
2055	33.94836
2060	32.16695
2065	30.38024
2070	29.09509
2075	28.25703
2080	27.69684
2085	27.33335
2090	27.07505
2095	27.00686
2100	26.95554