Year	Percent
1950	22.33915
1955	23.77956
1960	25.54088
1965	26.36104
1970	27.05366
1975	26.01299
1980	25.12373
1985	25.66263
1990	25.92244
1995	26.34681
2000	27.1394
2005	27.8087
2010	28.94255
2015	30.76917
2020	31.78412
2025	31.9463
2030	31.83833
2035	31.42484
2040	31.32237
2045	31.49533
2050	31.32609
2055	30.79767
2060	30.12298
2065	29.51188
2070	29.01673
2075	28.55859
2080	28.03523
2085	27.42365
2090	26.75414
2095	26.09861
2100	25.50157