Year	Percent
1950	29.14584
1955	28.35367
1960	27.99854
1965	27.64086
1970	26.97816
1975	27.34318
1980	27.4386
1985	27.29428
1990	27.60013
1995	27.30596
2000	27.95597
2005	29.82979
2010	31.51305
2015	32.97728
2020	33.55794
2025	32.90731
2030	32.28274
2035	31.63657
2040	30.9748
2045	30.32301
2050	29.53815
2055	28.81018
2060	28.08289
2065	27.43998
2070	26.85221
2075	26.31002
2080	25.78653
2085	25.28442
2090	24.84548
2095	24.46554
2100	24.14708