Year	Percent
1950	13.70536
1955	12.80267
1960	13.88896
1965	14.35537
1970	14.93219
1975	15.02417
1980	15.38586
1985	15.81019
1990	15.4516
1995	14.90798
2000	14.69474
2005	15.09783
2010	14.71405
2015	14.20697
2020	14.03648
2025	13.78314
2030	13.40292
2035	12.93917
2040	12.51582
2045	12.11034
2050	11.714
2055	11.31708
2060	10.91583
2065	10.55294
2070	10.19567
2075	9.84999
2080	9.50053
2085	9.17771
2090	8.85401
2095	8.55603
2100	8.24134