Year	Percent
1950	6.53821
1955	5.21122
1960	4.57348
1965	4.28714
1970	4.83297
1975	4.94886
1980	5.18583
1985	5.40575
1990	5.98502
1995	6.12979
2000	6.52387
2005	7.38784
2010	8.23413
2015	9.59456
2020	11.22518
2025	12.84371
2030	14.5684
2035	16.32794
2040	18.12123
2045	20.76484
2050	23.89466
2055	26.88802
2060	29.18722
2065	30.68239
2070	31.66156
2075	32.54891
2080	33.54694
2085	34.55135
2090	35.38289
2095	35.96563
2100	36.37451