Year	Percent
1950	12.9427
1955	12.93319
1960	13.00369
1965	13.17973
1970	13.43971
1975	13.72203
1980	13.89389
1985	13.92908
1990	13.87386
1995	13.37483
2000	12.80039
2005	12.09979
2010	11.53631
2015	11.7115
2020	12.88862
2025	15.09915
2030	17.2674
2035	18.40685
2040	18.81909
2045	19.42277
2050	20.46306
2055	21.74129
2060	22.82567
2065	23.17204
2070	23.14037
2075	23.33392
2080	23.71639
2085	24.12407
2090	24.37096
2095	24.39758
2100	24.30597