Year	Percent
1950	26.23689
1955	27.28751
1960	26.88499
1965	26.15959
1970	24.69854
1975	23.53271
1980	23.39129
1985	23.07109
1990	24.26682
1995	24.8982
2000	25.85272
2005	27.07059
2010	27.00325
2015	26.83552
2020	26.19033
2025	25.35406
2030	24.93893
2035	24.99838
2040	24.77599
2045	24.00294
2050	23.58468
2055	23.51367
2060	23.80944
2065	24.25377
2070	24.00742
2075	23.52414
2080	23.12064
2085	22.92617
2090	22.94195
2095	22.98096
2100	22.86336