Year	Percent
1950	27.45951
1955	27.47462
1960	27.30826
1965	27.12666
1970	27.05585
1975	26.70799
1980	26.56943
1985	26.63301
1990	26.79376
1995	27.27126
2000	27.81752
2005	27.96934
2010	28.01835
2015	27.91334
2020	27.88961
2025	28.32586
2030	29.00982
2035	29.75391
2040	30.28683
2045	30.49679
2050	30.56882
2055	30.55427
2060	30.55674
2065	30.49663
2070	30.30482
2075	30.01232
2080	29.68015
2085	29.32588
2090	28.97403
2095	28.60418
2100	28.20555