Year	Percent
1950	28.57218
1955	27.47019
1960	26.60305
1965	24.23316
1970	23.03871
1975	22.5808
1980	21.64468
1985	21.54395
1990	22.78528
1995	23.43014
2000	25.34983
2005	28.25716
2010	31.79378
2015	34.97004
2020	36.2099
2025	35.65634
2030	34.47136
2035	33.69628
2040	33.63522
2045	33.61105
2050	33.01659
2055	32.09051
2060	31.11109
2065	30.33668
2070	29.70403
2075	29.04997
2080	28.28355
2085	27.47946
2090	26.74775
2095	26.14223
2100	25.64734