Year	Percent
1950	5.23046
1955	3.82109
1960	3.92142
1965	3.46968
1970	3.69031
1975	4.1109
1980	4.22405
1985	4.27297
1990	4.68788
1995	4.74252
2000	5.22448
2005	6.50091
2010	7.39676
2015	8.53232
2020	10.04854
2025	11.50965
2030	12.36254
2035	12.98183
2040	14.07145
2045	15.54764
2050	16.64336
2055	17.82418
2060	18.71717
2065	19.85691
2070	21.62581
2075	23.336
2080	24.76532
2085	25.99974
2090	27.18389
2095	28.38819
2100	29.55138