Year	Percent
1950	27.25035
1955	26.97364
1960	26.41583
1965	26.59237
1970	26.32414
1975	26.31064
1980	26.38666
1985	24.96647
1990	25.95731
1995	25.10333
2000	25.16857
2005	24.10083
2010	23.73993
2015	23.641
2020	23.89725
2025	24.85524
2030	26.09052
2035	27.26153
2040	28.0732
2045	28.72255
2050	29.36302
2055	30.00598
2060	30.60031
2065	31.07565
2070	31.41028
2075	31.57877
2080	31.601
2085	31.48059
2090	31.22066
2095	30.87398
2100	30.43075