Year	Percent
1950	10.69708
1955	10.68463
1960	10.48059
1965	10.05064
1970	9.50863
1975	9.01055
1980	7.54078
1985	7.41412
1990	7.19569
1995	6.98826
2000	6.4817
2005	6.10501
2010	6.41542
2015	6.29892
2020	6.32562
2025	6.00387
2030	5.69948
2035	5.49334
2040	5.45768
2045	5.50159
2050	5.51807
2055	5.4463
2060	5.32841
2065	5.21663
2070	5.14554
2075	5.11922
2080	5.09717
2085	5.05533
2090	4.98242
2095	4.89668
2100	4.82332