Year	Percent
1950	14.3548
1955	14.17101
1960	14.13627
1965	14.23395
1970	14.23825
1975	14.06497
1980	13.75661
1985	13.60328
1990	13.40043
1995	13.08493
2000	12.8721
2005	12.64964
2010	12.5453
2015	12.80798
2020	13.27684
2025	13.79912
2030	14.20765
2035	14.48977
2040	14.87828
2045	15.58803
2050	16.60785
2055	17.81355
2060	18.91295
2065	19.81103
2070	20.58503
2075	21.28529
2080	21.99899
2085	22.68532
2090	23.28136
2095	23.77764
2100	24.17174