Year	Percent
1950	13.52707
1955	13.63018
1960	13.12793
1965	13.39278
1970	13.69447
1975	13.93242
1980	14.05497
1985	14.18178
1990	14.36259
1995	14.4734
2000	14.5997
2005	14.61843
2010	14.88116
2015	15.13179
2020	15.09765
2025	14.62001
2030	14.07358
2035	13.57268
2040	13.04423
2045	12.45589
2050	11.78983
2055	11.11716
2060	10.48457
2065	9.88509
2070	9.35544
2075	8.82625
2080	8.32958
2085	7.87725
2090	7.45111
2095	7.07785
2100	6.74811