Year	Percent
1950	4.53563
1955	4.50165
1960	4.51621
1965	4.56028
1970	4.5997
1975	4.61257
1980	4.58025
1985	4.59314
1990	5.00132
1995	4.83444
2000	4.84169
2005	4.82696
2010	4.80276
2015	4.83015
2020	4.84981
2025	4.86725
2030	4.92918
2035	5.14864
2040	5.49562
2045	5.97636
2050	6.54682
2055	7.29649
2060	8.24285
2065	9.36785
2070	10.58973
2075	11.85631
2080	13.12113
2085	14.44609
2090	15.82983
2095	17.24087
2100	18.64637