Year	Percent
1950	22.92451
1955	21.70661
1960	22.91901
1965	23.89439
1970	24.11209
1975	24.19146
1980	24.46089
1985	24.93898
1990	26.15315
1995	27.48719
2000	28.59224
2005	29.27658
2010	29.02481
2015	27.93684
2020	28.06159
2025	29.32641
2030	31.33949
2035	32.53663
2040	32.18947
2045	31.29259
2050	30.04028
2055	29.39358
2060	29.0531
2065	28.64747
2070	27.97818
2075	27.08146
2080	26.1178
2085	25.21105
2090	24.43125
2095	23.73684
2100	23.07867