Year	Percent
1950	32.43925
1955	31.48365
1960	30.43805
1965	29.51895
1970	29.17245
1975	29.42007
1980	28.76068
1985	28.653
1990	28.42697
1995	28.58004
2000	29.79416
2005	30.50628
2010	31.15282
2015	31.30344
2020	30.28597
2025	29.81547
2030	29.30194
2035	28.8276
2040	28.48717
2045	27.91182
2050	27.2737
2055	26.54282
2060	25.87494
2065	25.29305
2070	24.77576
2075	24.29209
2080	23.83009
2085	23.4008
2090	23.01298
2095	22.68794
2100	22.41585