Year	Percent
1950	28.78406
1955	27.56942
1960	26.08263
1965	24.23433
1970	23.44427
1975	23.94504
1980	24.36663
1985	25.62967
1990	26.89535
1995	28.70158
2000	30.54996
2005	30.96059
2010	33.23654
2015	28.73943
2020	29.76535
2025	32.49333
2030	33.14634
2035	34.09597
2040	33.05427
2045	31.48704
2050	29.9118
2055	28.7444
2060	28.14559
2065	27.47128
2070	26.58408
2075	25.52639
2080	24.48783
2085	23.71656
2090	23.23563
2095	22.9176
2100	22.61064