Year	Percent
1950	27.63954
1955	27.7442
1960	27.40546
1965	26.84293
1970	26.1006
1975	26.70789
1980	28.17508
1985	29.59615
1990	30.78095
1995	31.68438
2000	32.3211
2005	32.75332
2010	32.47929
2015	31.21252
2020	30.21949
2025	29.10203
2030	28.05973
2035	27.27208
2040	26.2494
2045	25.24232
2050	24.26097
2055	23.28067
2060	22.46278
2065	21.86236
2070	21.42344
2075	21.02587
2080	20.65236
2085	20.30014
2090	20.01002
2095	19.81451
2100	19.69396