Year	Percent
1950	14.7041
1955	14.57299
1960	14.38724
1965	14.17573
1970	13.93122
1975	13.61351
1980	13.25017
1985	13.00061
1990	12.37124
1995	12.85656
2000	12.55732
2005	12.07725
2010	11.7719
2015	11.75146
2020	12.05517
2025	12.55821
2030	13.12296
2035	13.83151
2040	14.75534
2045	15.85219
2050	17.02243
2055	18.08642
2060	18.9682
2065	19.76731
2070	20.54806
2075	21.30999
2080	22.02976
2085	22.61884
2090	23.06345
2095	23.39455
2100	23.66501