Year	Percent
1950	3.89515
1955	3.87329
1960	3.93185
1965	4.01038
1970	3.96916
1975	4.06266
1980	4.20771
1985	4.50813
1990	5.25515
1995	5.46098
2000	5.58434
2005	5.61169
2010	5.66337
2015	6.09665
2020	6.49566
2025	6.87535
2030	7.45734
2035	8.38254
2040	9.76519
2045	11.56796
2050	13.55647
2055	15.9364
2060	18.45137
2065	20.95975
2070	23.01358
2075	24.89161
2080	26.68045
2085	28.33052
2090	29.80599
2095	31.11279
2100	32.27554