Year	Percent
1950	14.35735
1955	14.22049
1960	14.02255
1965	13.789
1970	13.51156
1975	13.16215
1980	12.79511
1985	12.44969
1990	11.45448
1995	12.36323
2000	12.01365
2005	11.40998
2010	10.8653
2015	10.71548
2020	11.07052
2025	11.73527
2030	12.54639
2035	13.4351
2040	14.43961
2045	15.57215
2050	16.75311
2055	17.82755
2060	18.72972
2065	19.55232
2070	20.36068
2075	21.15674
2080	21.92073
2085	22.56395
2090	23.06722
2095	23.45681
2100	23.78203