Year	Percent
1950	5.27965
1955	5.34265
1960	5.54145
1965	5.62764
1970	5.61638
1975	5.52087
1980	5.40111
1985	5.30255
1990	5.71233
1995	5.60449
2000	5.40291
2005	5.18247
2010	5.01683
2015	5.09137
2020	5.30713
2025	5.70471
2030	6.24747
2035	6.92858
2040	7.66448
2045	8.26853
2050	8.67853
2055	9.04366
2060	9.63153
2065	10.49792
2070	11.67598
2075	12.94241
2080	14.05146
2085	15.12994
2090	16.2672
2095	17.48096
2100	18.70611