Year	Percent
1950	13.57027
1955	13.66047
1960	13.66338
1965	13.63065
1970	13.65521
1975	13.70558
1980	13.7301
1985	13.73955
1990	13.62067
1995	13.58332
2000	13.46766
2005	13.33908
2010	13.26098
2015	13.18294
2020	13.35697
2025	13.64186
2030	14.13992
2035	14.86472
2040	15.71898
2045	16.50282
2050	17.17923
2055	17.85869
2060	18.52037
2065	19.23284
2070	19.93842
2075	20.55331
2080	21.09355
2085	21.60552
2090	22.09719
2095	22.55404
2100	22.98503