Year	Percent
1950	12.81455
1955	12.94398
1960	13.0223
1965	13.67054
1970	14.04633
1975	14.59361
1980	14.91657
1985	15.67802
1990	16.00947
1995	15.75743
2000	15.62825
2005	15.59403
2010	15.59286
2015	15.53198
2020	15.00242
2025	14.38562
2030	13.81566
2035	13.31674
2040	12.81586
2045	12.30318
2050	11.75379
2055	11.2018
2060	10.70954
2065	10.23799
2070	9.81597
2075	9.40767
2080	9.00881
2085	8.63077
2090	8.28009
2095	7.93467
2100	7.62622