Year	Percent
1950	12.50803
1955	12.72785
1960	13.92373
1965	14.14139
1970	14.23985
1975	14.32236
1980	14.47478
1985	14.51912
1990	14.23902
1995	13.44612
2000	13.15064
2005	13.3635
2010	12.96907
2015	12.44422
2020	11.75308
2025	11.25384
2030	10.84645
2035	10.46321
2040	10.09623
2045	9.71744
2050	9.35766
2055	9.01171
2060	8.71532
2065	8.4407
2070	8.17674
2075	7.92649
2080	7.67445
2085	7.44017
2090	7.21497
2095	7.00435
2100	6.81563