Year	Percent
1950	27.32623
1955	27.53649
1960	27.66612
1965	27.77865
1970	27.43029
1975	25.53169
1980	24.61224
1985	24.08803
1990	23.8057
1995	23.28775
2000	24.37271
2005	26.48503
2010	29.42358
2015	32.23808
2020	33.13272
2025	33.29786
2030	33.13286
2035	32.91301
2040	33.08853
2045	33.08542
2050	32.67328
2055	31.88931
2060	31.05739
2065	30.27982
2070	29.52304
2075	28.68236
2080	27.74738
2085	26.77249
2090	25.82638
2095	25.01371
2100	24.3689