Year	Percent
1950	28.35663
1955	28.9329
1960	30.16524
1965	27.0606
1970	23.1676
1975	23.89368
1980	24.6695
1985	27.45575
1990	28.46191
1995	28.39731
2000	28.83505
2005	30.10139
2010	31.85459
2015	32.51686
2020	32.46681
2025	31.00758
2030	29.79876
2035	30.00906
2040	30.4447
2045	30.97733
2050	30.42535
2055	29.28629
2060	28.56681
2065	28.37157
2070	28.32991
2075	27.98869
2080	27.24499
2085	26.36823
2090	25.66884
2095	25.19691
2100	24.77728