Year	Percent
1950	10.2451
1955	9.94587
1960	9.58885
1965	9.56527
1970	9.958
1975	10.71294
1980	11.52102
1985	12.58423
1990	15.52684
1995	16.08533
2000	16.66421
2005	17.87415
2010	19.95796
2015	22.37901
2020	25.17176
2025	27.83443
2030	29.17145
2035	30.02664
2040	30.69467
2045	31.45311
2050	31.96582
2055	32.71824
2060	32.98827
2065	33.03838
2070	33.50393
2075	33.99411
2080	34.46253
2085	34.875
2090	35.25664
2095	35.62937
2100	36.07495