Year	Percent
1950	5.10043
1955	5.06858
1960	5.03854
1965	5.08526
1970	5.18002
1975	5.33833
1980	5.56633
1985	5.84237
1990	7.15146
1995	7.68824
2000	8.32436
2005	9.15469
2010	10.17967
2015	11.45533
2020	13.00483
2025	14.81309
2030	16.78455
2035	18.84515
2040	20.75833
2045	22.46842
2050	24.077
2055	25.55289
2060	27.04477
2065	28.41368
2070	29.78169
2075	31.21597
2080	32.5253
2085	33.74606
2090	34.8945
2095	35.95098
2100	36.90224