Year	Percent
1950	14.93375
1955	14.99828
1960	14.98775
1965	14.78631
1970	14.48365
1975	13.95959
1980	13.82316
1985	12.70027
1990	11.60158
1995	11.46539
2000	11.96412
2005	13.1394
2010	14.29774
2015	15.64468
2020	17.01791
2025	18.90925
2030	21.35225
2035	23.93102
2040	25.79214
2045	26.77558
2050	27.40793
2055	27.59872
2060	27.9427
2065	28.28167
2070	28.1403
2075	27.80806
2080	27.34719
2085	26.87661
2090	26.40996
2095	25.93844
2100	25.46756