Year	Percent
1950	27.01868
1955	26.47304
1960	26.11271
1965	26.31788
1970	26.16914
1975	27.14123
1980	27.76545
1985	27.80749
1990	28.09707
1995	28.3437
2000	29.15851
2005	30.06401
2010	30.77921
2015	31.37662
2020	31.67324
2025	31.60415
2030	31.23276
2035	30.5212
2040	29.69654
2045	28.92315
2050	28.24809
2055	27.66461
2060	26.97747
2065	26.24739
2070	25.53595
2075	24.88117
2080	24.28866
2085	23.75025
2090	23.2523
2095	22.79099
2100	22.37254