Year	Percent
1950	13.22249
1955	13.30557
1960	13.37091
1965	13.38115
1970	13.37978
1975	13.35207
1980	13.31939
1985	13.27205
1990	13.1445
1995	12.80938
2000	12.5562
2005	12.33975
2010	12.17618
2015	12.14578
2020	12.22908
2025	12.44589
2030	12.77799
2035	13.25304
2040	13.87427
2045	14.77824
2050	15.98741
2055	17.37361
2060	18.7412
2065	19.96016
2070	21.02337
2075	21.95691
2080	22.81485
2085	23.54509
2090	24.09746
2095	24.48147
2100	24.72542