Year	Percent
1950	5.06031
1955	4.80607
1960	4.99333
1965	5.38934
1970	5.70411
1975	5.92638
1980	5.94239
1985	5.73703
1990	6.07868
1995	6.1122
2000	6.26164
2005	6.421
2010	6.49821
2015	7.05123
2020	7.66158
2025	8.46211
2030	9.27574
2035	10.03093
2040	11.2786
2045	13.26607
2050	15.22108
2055	17.00918
2060	18.67015
2065	20.11248
2070	21.49768
2075	22.73103
2080	23.93497
2085	25.06113
2090	26.09289
2095	27.03359
2100	27.88954