Year	Percent
1950	27.84773
1955	27.72641
1960	27.16654
1965	26.47812
1970	26.17821
1975	26.63026
1980	27.11351
1985	27.67747
1990	28.84732
1995	29.77738
2000	30.07136
2005	30.02644
2010	30.33781
2015	31.46547
2020	32.35713
2025	32.05564
2030	30.92121
2035	28.80823
2040	26.83914
2045	25.85197
2050	24.9989
2055	24.00666
2060	22.71928
2065	21.49664
2070	20.56166
2075	19.93897
2080	19.53204
2085	19.19998
2090	18.8762
2095	18.58336
2100	18.3743