Year	Percent
1950	11.29648
1955	11.6427
1960	12.26341
1965	13.32705
1970	14.48659
1975	15.2285
1980	15.79601
1985	16.27942
1990	16.31737
1995	15.80362
2000	15.05586
2005	14.26957
2010	14.0193
2015	13.8288
2020	12.99277
2025	11.85166
2030	11.02597
2035	10.46239
2040	10.05573
2045	9.66835
2050	9.22981
2055	8.73047
2060	8.23694
2065	7.81766
2070	7.47708
2075	7.18781
2080	6.90108
2085	6.62196
2090	6.35703
2095	6.12418
2100	5.93591