Year	Percent
1950	7.44179
1955	6.39415
1960	5.51513
1965	5.42085
1970	5.24816
1975	5.46857
1980	5.42565
1985	5.97841
1990	7.28688
1995	7.85443
2000	8.19916
2005	8.52317
2010	9.10848
2015	9.9393
2020	11.24375
2025	13.53859
2030	15.24416
2035	17.0399
2040	18.02512
2045	19.22069
2050	20.46842
2055	21.9778
2060	23.46382
2065	24.80222
2070	26.09061
2075	27.43017
2080	28.65887
2085	29.75517
2090	30.73102
2095	31.59156
2100	32.34743