Year	Percent
1950	13.69427
1955	14.78621
1960	14.96787
1965	15.55829
1970	15.93799
1975	16.32057
1980	16.82932
1985	16.87941
1990	16.86457
1995	17.07886
2000	15.61646
2005	14.39177
2010	13.2537
2015	13.02755
2020	12.70231
2025	12.2533
2030	11.43509
2035	10.62103
2040	9.98373
2045	9.49673
2050	9.02079
2055	8.51028
2060	8.00572
2065	7.56469
2070	7.21517
2075	6.93856
2080	6.69381
2085	6.46801
2090	6.24938
2095	6.06891
2100	5.92282