Year	Percent
1950	14.11692
1955	14.06505
1960	14.28828
1965	14.74133
1970	15.28677
1975	15.18716
1980	15.49435
1985	15.38748
1990	15.11533
1995	14.9757
2000	14.81478
2005	15.25326
2010	15.42455
2015	14.77882
2020	14.23043
2025	13.91595
2030	13.5905
2035	13.18698
2040	12.71271
2045	12.23176
2050	11.80579
2055	11.41247
2060	11.03838
2065	10.62804
2070	10.23863
2075	9.86708
2080	9.52347
2085	9.20135
2090	8.88035
2095	8.56578
2100	8.26182