Year	Percent
1950	14.54816
1955	14.49493
1960	14.08647
1965	14.00936
1970	14.29159
1975	14.4176
1980	14.84141
1985	15.00065
1990	15.70192
1995	17.17043
2000	18.76866
2005	20.91792
2010	22.68194
2015	23.94536
2020	25.3566
2025	26.73582
2030	27.72403
2035	28.35606
2040	28.50546
2045	27.80476
2050	26.87748
2055	26.12366
2060	25.19886
2065	24.50085
2070	24.08884
2075	23.59286
2080	23.14501
2085	22.80836
2090	22.59432
2095	22.44387
2100	22.32416