Year	Percent
1950	5.70957
1955	5.76035
1960	5.87268
1965	5.91905
1970	5.89019
1975	5.78288
1980	5.67166
1985	5.57513
1990	6.05825
1995	5.96129
2000	5.75679
2005	5.52976
2010	5.35078
2015	5.41407
2020	5.61519
2025	5.99815
2030	6.53032
2035	7.22782
2040	8.00911
2045	8.67168
2050	9.14931
2055	9.58636
2060	10.24517
2065	11.18518
2070	12.43782
2075	13.77476
2080	14.94841
2085	16.08703
2090	17.2782
2095	18.53729
2100	19.79864