Year	Percent
1950	21.84181
1955	23.74488
1960	21.68792
1965	22.11766
1970	24.07227
1975	23.58826
1980	27.21122
1985	25.90438
1990	24.28773
1995	26.26858
2000	26.14366
2005	28.35588
2010	28.35529
2015	27.89631
2020	28.03758
2025	29.03235
2030	31.02937
2035	30.73511
2040	28.45097
2045	25.11003
2050	22.99112
2055	23.05252
2060	24.3863
2065	25.69399
2070	25.26794
2075	24.28653
2080	23.58456
2085	23.52664
2090	23.96255
2095	24.39199
2100	24.3584