Year	Percent
1950	27.87715
1955	27.24998
1960	26.77561
1965	26.62884
1970	26.81133
1975	27.49667
1980	28.7596
1985	30.23515
1990	31.62172
1995	32.70259
2000	32.88348
2005	32.34282
2010	31.49851
2015	30.40226
2020	29.70353
2025	29.10316
2030	28.55421
2035	28.17546
2040	27.5753
2045	27.00691
2050	26.39494
2055	25.67074
2060	25.04011
2065	24.45371
2070	23.87188
2075	23.29793
2080	22.75359
2085	22.25234
2090	21.80238
2095	21.41331
2100	21.07652