Year	Percent
1950	5.35101
1955	5.33512
1960	5.34636
1965	5.25879
1970	5.22814
1975	5.23821
1980	5.19417
1985	5.29385
1990	6.07421
1995	6.60107
2000	7.25367
2005	8.12519
2010	8.94642
2015	9.96664
2020	11.20977
2025	12.80695
2030	14.60319
2035	16.46369
2040	18.56154
2045	20.61252
2050	22.84849
2055	24.94225
2060	26.67703
2065	28.29134
2070	29.87044
2075	31.51851
2080	32.97367
2085	34.21624
2090	35.2597
2095	36.15733
2100	36.94552