Year	Percent
1950	4.30311
1955	4.29884
1960	4.34046
1965	4.25893
1970	4.21709
1975	4.18527
1980	4.16522
1985	4.25207
1990	4.42064
1995	4.40499
2000	4.37978
2005	4.33277
2010	4.29556
2015	4.21333
2020	4.24519
2025	4.34588
2030	4.51049
2035	4.82335
2040	5.24418
2045	5.69271
2050	6.09627
2055	6.50046
2060	7.02579
2065	7.75034
2070	8.6267
2075	9.61107
2080	10.58572
2085	11.58199
2090	12.62083
2095	13.7205
2100	14.86249