Year	Percent
1950	28.34689
1955	27.07703
1960	26.17698
1965	25.44482
1970	24.60145
1975	20.98281
1980	24.73859
1985	26.33547
1990	28.03158
1995	26.11669
2000	27.24949
2005	27.29075
2010	29.30568
2015	33.3352
2020	36.50062
2025	36.56577
2030	34.81595
2035	32.64606
2040	31.00338
2045	30.34688
2050	30.45729
2055	30.38697
2060	29.47731
2065	28.09696
2070	26.8962
2075	26.39568
2080	26.54982
2085	26.78318
2090	26.51152
2095	25.66928
2100	24.70271