Year	Percent
1950	28.1319
1955	25.29592
1960	23.17633
1965	22.03808
1970	22.48203
1975	21.96553
1980	23.35393
1985	23.64659
1990	25.36549
1995	27.64928
2000	28.24954
2005	30.40044
2010	32.77648
2015	35.20624
2020	36.45514
2025	35.8445
2030	34.6669
2035	34.13391
2040	33.68231
2045	33.52575
2050	33.16846
2055	32.21797
2060	31.21729
2065	30.43622
2070	29.84394
2075	29.2705
2080	28.62983
2085	27.92108
2090	27.24858
2095	26.63955
2100	26.0943