Year	Percent
1950	13.75503
1955	12.15528
1960	11.22278
1965	10.64241
1970	10.21323
1975	10.33637
1980	10.66517
1985	10.84205
1990	11.01437
1995	10.68659
2000	10.63351
2005	11.40463
2010	12.29616
2015	13.26758
2020	14.32737
2025	15.1774
2030	16.40562
2035	18.20514
2040	19.62602
2045	20.49795
2050	21.1474
2055	21.56528
2060	22.18842
2065	23.01027
2070	23.58251
2075	23.85457
2080	23.96394
2085	24.0755
2090	24.23446
2095	24.38784
2100	24.45089