Year	Percent
1950	12.87417
1955	13.89396
1960	15.09958
1965	16.27389
1970	17.30326
1975	18.10921
1980	18.85338
1985	19.37065
1990	23.63677
1995	22.67989
2000	21.80813
2005	21.91535
2010	22.81946
2015	23.39712
2020	24.53381
2025	25.77587
2030	27.38004
2035	28.6024
2040	29.02926
2045	29.52849
2050	30.26685
2055	30.95272
2060	31.5339
2065	31.99496
2070	32.58521
2075	33.05861
2080	33.64755
2085	34.26362
2090	34.85958
2095	35.43705
2100	35.99595