Year	Percent
1950	21.70737
1955	23.35116
1960	22.60131
1965	24.1951
1970	25.12828
1975	25.78728
1980	26.78116
1985	25.55656
1990	25.77055
1995	26.20542
2000	27.42675
2005	28.48124
2010	27.87209
2015	28.12793
2020	28.9346
2025	29.39299
2030	30.17038
2035	29.02493
2040	26.20868
2045	24.27688
2050	22.88471
2055	22.69594
2060	24.00696
2065	24.86256
2070	24.41482
2075	23.85817
2080	23.41715
2085	23.32227
2090	23.55511
2095	23.84711
2100	23.79613