Year	Percent
1950	26.77421
1955	26.84718
1960	26.01864
1965	24.61778
1970	24.10951
1975	24.97041
1980	26.75597
1985	28.82754
1990	30.2224
1995	30.70941
2000	30.73273
2005	30.73326
2010	30.84113
2015	31.05948
2020	30.94469
2025	30.74046
2030	30.45902
2035	30.01376
2040	29.63418
2045	28.94976
2050	28.0903
2055	27.14945
2060	26.23803
2065	25.36007
2070	24.51721
2075	23.72718
2080	23.01854
2085	22.41814
2090	21.93569
2095	21.55392
2100	21.25947