Year	Percent
1950	12.53336
1955	12.49891
1960	14.45936
1965	14.7109
1970	14.78018
1975	14.88579
1980	15.06616
1985	15.09322
1990	14.72903
1995	14.57747
2000	14.77914
2005	14.98865
2010	14.37809
2015	13.7076
2020	13.02819
2025	12.75272
2030	12.40377
2035	11.9357
2040	11.38434
2045	10.8668
2050	10.4238
2055	10.02076
2060	9.62945
2065	9.22132
2070	8.82882
2075	8.46521
2080	8.11343
2085	7.79488
2090	7.48588
2095	7.18496
2100	6.9111