Year	Percent
1950	6.59881
1955	5.45096
1960	4.74458
1965	4.34352
1970	4.187
1975	4.16877
1980	4.15879
1985	4.12329
1990	4.30277
1995	4.33435
2000	4.22098
2005	4.15813
2010	4.12562
2015	4.22243
2020	4.38578
2025	4.65761
2030	5.06111
2035	5.63024
2040	6.31219
2045	7.00511
2050	7.6576
2055	8.18196
2060	8.74812
2065	9.5557
2070	10.51334
2075	11.42883
2080	12.24915
2085	13.01882
2090	13.80965
2095	14.63344
2100	15.47438