Year	Percent
1950	15.15638
1955	15.35414
1960	15.41457
1965	15.22534
1970	14.8967
1975	14.30185
1980	14.14759
1985	13.07986
1990	12.07968
1995	11.86194
2000	12.33855
2005	13.43732
2010	14.61804
2015	16.10545
2020	17.55838
2025	19.41682
2030	21.72867
2035	24.13273
2040	25.82503
2045	26.67341
2050	27.18939
2055	27.26152
2060	27.4988
2065	27.75316
2070	27.54776
2075	27.16373
2080	26.66409
2085	26.16941
2090	25.6931
2095	25.22616
2100	24.77363