Year	Percent
1950	26.59357
1955	25.95004
1960	25.64238
1965	25.68208
1970	25.55756
1975	26.83823
1980	28.23456
1985	29.51894
1990	30.93963
1995	31.49075
2000	31.58743
2005	31.53821
2010	31.66005
2015	31.53873
2020	31.22949
2025	30.50969
2030	29.6859
2035	28.92163
2040	28.18983
2045	27.58478
2050	26.82846
2055	25.99438
2060	25.16958
2065	24.40684
2070	23.70891
2075	23.06537
2080	22.47584
2085	21.94891
2090	21.48621
2095	21.09299
2100	20.75611