Year	Percent
1950	12.34319
1955	12.39834
1960	12.65237
1965	12.78698
1970	13.35044
1975	13.85518
1980	14.25766
1985	14.5814
1990	15.08899
1995	15.08114
2000	14.58933
2005	14.08517
2010	14.18522
2015	14.23596
2020	13.90635
2025	13.27535
2030	12.70359
2035	12.16838
2040	11.70327
2045	11.23424
2050	10.77124
2055	10.30072
2060	9.84115
2065	9.40534
2070	9.01321
2075	8.66174
2080	8.31208
2085	7.9742
2090	7.65284
2095	7.35242
2100	7.0744