Year	Percent
1950	5.92435
1955	5.95167
1960	6.00598
1965	6.02266
1970	5.99105
1975	5.92392
1980	5.80547
1985	5.62613
1990	5.92206
1995	5.7395
2000	5.56419
2005	5.38448
2010	5.22802
2015	5.13033
2020	5.09215
2025	5.18395
2030	5.41415
2035	5.81502
2040	6.43358
2045	7.31597
2050	8.32162
2055	9.32677
2060	10.33919
2065	11.53517
2070	12.90404
2075	14.33328
2080	15.72604
2085	17.09211
2090	18.42319
2095	19.73346
2100	21.0208