Year	Percent
1950	29.04858
1955	28.93859
1960	28.71343
1965	28.05278
1970	27.23501
1975	26.44549
1980	25.68025
1985	25.30058
1990	25.34101
1995	25.86378
2000	26.89176
2005	28.09838
2010	29.11962
2015	29.67186
2020	29.87411
2025	30.11888
2030	30.57299
2035	31.129
2040	31.53441
2045	31.55902
2050	31.26516
2055	30.88678
2060	30.5557
2065	30.23175
2070	29.87387
2075	29.44923
2080	28.97492
2085	28.48445
2090	28.02165
2095	27.58247
2100	27.15749