Year	Percent
1950	9.39178
1955	10.03768
1960	9.28732
1965	7.97117
1970	6.66059
1975	5.52863
1980	4.65116
1985	4.08637
1990	4.42948
1995	4.53369
2000	4.65996
2005	4.78373
2010	5.05048
2015	5.62733
2020	6.30433
2025	7.19482
2030	8.3297
2035	9.76146
2040	11.5101
2045	13.24271
2050	14.79009
2055	15.98394
2060	17.67484
2065	19.7007
2070	22.10627
2075	24.17121
2080	26.00758
2085	27.81387
2090	29.68353
2095	31.59095
2100	33.40158