Year	Percent
1950	24.47814
1955	24.63729
1960	24.3701
1965	28.26018
1970	34.30637
1975	30.16723
1980	30.61017
1985	30.7336
1990	29.33853
1995	28.82528
2000	26.18755
2005	26.01321
2010	23.91776
2015	22.02368
2020	21.15591
2025	20.86265
2030	21.91978
2035	21.86431
2040	21.85577
2045	21.74374
2050	20.85053
2055	20.43334
2060	20.2351
2065	20.06158
2070	19.60653
2075	18.9644
2080	18.33009
2085	17.83094
2090	17.50661
2095	17.27825
2100	17.04928