Year	Percent
1950	5.27668
1955	4.89321
1960	4.65254
1965	4.65176
1970	4.66972
1975	4.65763
1980	4.94063
1985	4.79737
1990	4.94458
1995	4.91291
2000	4.8782
2005	5.02669
2010	5.38049
2015	5.55789
2020	5.8473
2025	6.11259
2030	6.56043
2035	7.16981
2040	7.99458
2045	9.24659
2050	10.6591
2055	12.53722
2060	14.83315
2065	17.14522
2070	19.24094
2075	21.31964
2080	23.3455
2085	25.26416
2090	27.01908
2095	28.61855
2100	30.06813