Year	Percent
1950	4.51036
1955	4.13638
1960	4.01523
1965	4.05154
1970	4.16002
1975	4.29874
1980	4.43605
1985	4.50142
1990	4.63682
1995	4.60925
2000	4.71098
2005	4.60184
2010	4.43657
2015	4.45102
2020	4.58839
2025	4.832
2030	5.18435
2035	5.66859
2040	6.25548
2045	6.96449
2050	7.6598
2055	8.34216
2060	9.28534
2065	10.44916
2070	11.66045
2075	12.84271
2080	14.05231
2085	15.31711
2090	16.64484
2095	18.02215
2100	19.44069