Year	Percent
1950	6.50148
1955	8.11272
1960	7.98195
1965	8.34599
1970	8.54599
1975	7.7546
1980	6.99446
1985	6.3653
1990	6.28031
1995	6.25273
2000	6.27732
2005	5.84649
2010	5.73977
2015	6.00847
2020	5.99928
2025	5.92374
2030	5.694
2035	5.50807
2040	5.39829
2045	5.42487
2050	5.49917
2055	5.53434
2060	5.51469
2065	5.44753
2070	5.3848
2075	5.35759
2080	5.36293
2085	5.35941
2090	5.33147
2095	5.26991
2100	5.20245