Year	Percent
1950	5.54872
1955	6.23556
1960	6.59215
1965	6.775
1970	6.88212
1975	6.96768
1980	6.99575
1985	7.02969
1990	7.85885
1995	8.0428
2000	8.04792
2005	7.93486
2010	8.40781
2015	8.48288
2020	9.01336
2025	9.80537
2030	10.78224
2035	11.86701
2040	13.22906
2045	14.87153
2050	16.65586
2055	17.77698
2060	18.46155
2065	19.24159
2070	20.20304
2075	22.1882
2080	23.83462
2085	25.145
2090	26.31179
2095	27.59773
2100	29.01874