Year	Percent
1950	14.92337
1955	14.937
1960	14.90761
1965	15.14087
1970	15.08391
1975	14.77792
1980	14.72689
1985	14.88537
1990	14.87581
1995	14.14569
2000	13.79746
2005	13.38778
2010	12.16107
2015	12.64838
2020	11.64343
2025	11.10926
2030	10.54089
2035	10.04954
2040	9.6427
2045	9.24958
2050	8.87139
2055	8.49974
2060	8.12005
2065	7.77533
2070	7.4517
2075	7.16292
2080	6.87717
2085	6.60795
2090	6.35891
2095	6.14062
2100	5.94167