Year	Percent
1950	4.31677
1955	4.09477
1960	4.00014
1965	4.00503
1970	4.057
1975	4.14558
1980	4.44564
1985	4.51555
1990	4.78527
1995	4.91918
2000	4.91838
2005	5.31681
2010	5.87946
2015	6.76092
2020	7.56276
2025	8.96727
2030	10.21655
2035	11.34458
2040	11.31934
2045	15.26721
2050	16.94182
2055	19.56162
2060	21.45799
2065	22.65648
2070	24.17996
2075	25.86612
2080	27.51947
2085	28.89679
2090	30.09339
2095	31.26071
2100	32.44216