Year	Percent
1950	6.57211
1955	6.09252
1960	5.32931
1965	4.90296
1970	4.26454
1975	3.73341
1980	3.59144
1985	3.72328
1990	4.08894
1995	4.35245
2000	4.70093
2005	5.03752
2010	5.34929
2015	6.0809
2020	6.8267
2025	7.5961
2030	8.55414
2035	9.93339
2040	12.02008
2045	14.64572
2050	16.92001
2055	18.80924
2060	20.29331
2065	21.45513
2070	22.69123
2075	24.29514
2080	25.78519
2085	27.08147
2090	28.16436
2095	29.08906
2100	29.92176