Year	Percent
1950	17.61447
1955	18.10381
1960	18.85004
1965	18.7478
1970	18.42933
1975	18.16795
1980	17.81974
1985	17.57866
1990	17.38924
1995	17.00719
2000	16.50051
2005	16.04711
2010	15.67974
2015	15.30643
2020	14.56979
2025	13.84606
2030	13.19416
2035	12.63452
2040	12.1435
2045	11.66902
2050	11.19762
2055	10.73649
2060	10.30624
2065	9.91193
2070	9.544
2075	9.19721
2080	8.87719
2085	8.57404
2090	8.25583
2095	7.97567
2100	7.70151