Year	Percent
1950	6.07662
1955	6.09005
1960	6.08973
1965	3.68943
1970	6.60403
1975	6.05747
1980	6.50868
1985	6.48055
1990	7.38364
1995	7.15171
2000	6.89458
2005	6.00095
2010	5.19896
2015	4.88145
2020	5.13484
2025	5.64186
2030	6.09295
2035	6.63462
2040	7.94323
2045	8.50335
2050	9.51671
2055	10.15264
2060	10.97789
2065	12.22325
2070	13.57616
2075	14.90015
2080	16.09968
2085	17.26483
2090	18.45382
2095	19.65017
2100	20.83721