Year	Percent
1950	14.54812
1955	14.70846
1960	14.44843
1965	14.94198
1970	15.53678
1975	15.46985
1980	15.75795
1985	15.72701
1990	15.5056
1995	15.40892
2000	15.25567
2005	15.69236
2010	15.87582
2015	15.21141
2020	14.6583
2025	14.33703
2030	13.99878
2035	13.58717
2040	13.10677
2045	12.6162
2050	12.17608
2055	11.76657
2060	11.3892
2065	10.97609
2070	10.5846
2075	10.21087
2080	9.86274
2085	9.5309
2090	9.20138
2095	8.87863
2100	8.56694