Year	Percent
1950	14.99125
1955	14.72956
1960	14.65955
1965	14.51058
1970	14.24377
1975	13.53872
1980	12.61534
1985	11.68222
1990	10.81925
1995	11.14957
2000	11.40521
2005	11.63806
2010	11.81892
2015	11.83809
2020	12.18524
2025	12.57602
2030	13.08012
2035	13.55359
2040	14.04983
2045	14.83928
2050	15.855
2055	16.84579
2060	17.76871
2065	18.56167
2070	19.24424
2075	19.95395
2080	20.66139
2085	21.29653
2090	21.82311
2095	22.25136
2100	22.60762