Year	Percent
1950	27.48001
1955	27.43657
1960	27.21745
1965	26.98469
1970	26.87128
1975	26.57569
1980	26.48498
1985	26.58664
1990	26.78158
1995	27.27298
2000	27.87877
2005	28.10012
2010	27.84739
2015	27.55268
2020	27.63797
2025	28.10049
2030	28.96048
2035	29.83921
2040	30.37367
2045	30.66293
2050	30.74295
2055	30.74098
2060	30.77396
2065	30.74176
2070	30.57217
2075	30.30077
2080	29.98711
2085	29.64992
2090	29.31527
2095	28.95829
2100	28.57009