Year	Percent
1950	4.65699
1955	4.2792
1960	4.01736
1965	4.3439
1970	4.68046
1975	4.79628
1980	4.82801
1985	4.45406
1990	4.17307
1995	4.1723
2000	4.05546
2005	3.98413
2010	3.71953
2015	3.75669
2020	3.9142
2025	4.15671
2030	4.51236
2035	4.76262
2040	5.27521
2045	5.83624
2050	6.39801
2055	7.07403
2060	7.95261
2065	9.02303
2070	10.24134
2075	11.59116
2080	12.96901
2085	14.34529
2090	15.7064
2095	17.04741
2100	18.33718