Year	Percent
1950	6.75662
1955	7.184
1960	8.02659
1965	8.04163
1970	7.35053
1975	6.18657
1980	5.90523
1985	6.09314
1990	6.37366
1995	7.01393
2000	6.83468
2005	6.32571
2010	5.86254
2015	5.68132
2020	5.88621
2025	5.81304
2030	5.68966
2035	5.58665
2040	5.48834
2045	5.45124
2050	5.49487
2055	5.55063
2060	5.54846
2065	5.501
2070	5.43
2075	5.36229
2080	5.3161
2085	5.28816
2090	5.25104
2095	5.19696
2100	5.12019