Year	Percent
1950	4.04757
1955	3.26411
1960	3.2172
1965	3.24371
1970	3.54735
1975	4.00524
1980	4.17187
1985	4.21844
1990	4.74728
1995	4.98299
2000	5.66441
2005	6.89472
2010	7.90813
2015	9.25372
2020	11.0235
2025	12.784
2030	13.93159
2035	14.78313
2040	16.08442
2045	17.73289
2050	18.93076
2055	20.20621
2060	21.14367
2065	22.27756
2070	24.05112
2075	25.77381
2080	27.19663
2085	28.40995
2090	29.56006
2095	30.70163
2100	31.76369