Year	Percent
1950	28.92942
1955	28.3387
1960	27.77624
1965	27.23458
1970	26.59904
1975	26.44316
1980	26.06216
1985	25.63141
1990	25.2944
1995	25.05058
2000	25.12068
2005	25.4445
2010	26.12447
2015	26.96915
2020	27.92147
2025	28.94231
2030	29.9055
2035	30.7363
2040	31.40485
2045	31.89597
2050	32.21282
2055	32.33693
2060	32.27848
2065	32.06048
2070	31.73827
2075	31.36701
2080	30.97998
2085	30.60467
2090	30.25041
2095	29.90011
2100	29.5513