Year	Percent
1950	27.27564
1955	28.29494
1960	28.74634
1965	28.5472
1970	28.47378
1975	26.94855
1980	26.46173
1985	27.36053
1990	27.50806
1995	28.45257
2000	30.32134
2005	30.73389
2010	32.91311
2015	34.36981
2020	34.76958
2025	34.84085
2030	33.24946
2035	32.02838
2040	30.96746
2045	30.12366
2050	29.59364
2055	28.89357
2060	28.06014
2065	27.17769
2070	26.3816
2075	25.77517
2080	25.34812
2085	24.98854
2090	24.62541
2095	24.23586
2100	23.86488