Year	Percent
1950	24.47366
1955	25.21394
1960	25.2357
1965	24.89245
1970	23.66108
1975	22.38115
1980	22.0565
1985	23.26483
1990	25.50188
1995	26.87943
2000	27.78308
2005	28.19286
2010	27.56862
2015	27.37134
2020	26.71772
2025	24.84059
2030	23.38754
2035	23.76085
2040	24.22556
2045	24.99926
2050	25.21225
2055	24.00813
2060	23.24331
2065	23.12209
2070	23.06331
2075	23.49221
2080	23.61027
2085	23.32464
2090	22.89544
2095	22.60759
2100	22.53443