Year	Percent
1950	25.88356
1955	28.64731
1960	32.40855
1965	31.74703
1970	30.66758
1975	30.57587
1980	31.50351
1985	35.20927
1990	35.08951
1995	32.80147
2000	30.99798
2005	30.00666
2010	30.17483
2015	28.74087
2020	28.59252
2025	26.77741
2030	24.85063
2035	23.01213
2040	21.275
2045	21.38416
2050	21.44563
2055	21.41564
2060	21.05156
2065	20.48283
2070	20.10506
2075	20.19851
2080	20.60439
2085	20.95897
2090	21.03485
2095	20.84459
2100	20.59892