Year	Percent
1950	27.09872
1955	27.3876
1960	27.64547
1965	27.85851
1970	26.69705
1975	26.86725
1980	26.9588
1985	26.82534
1990	26.67321
1995	27.28495
2000	27.92612
2005	29.11302
2010	30.46345
2015	30.22379
2020	30.64427
2025	29.97373
2030	30.21236
2035	30.78093
2040	30.54122
2045	30.46748
2050	29.69052
2055	29.1923
2060	28.73823
2065	28.36183
2070	28.00133
2075	27.58662
2080	27.10539
2085	26.57782
2090	26.04224
2095	25.52199
2100	25.01097