Year	Percent
1950	6.63561
1955	6.13766
1960	7.64454
1965	7.52109
1970	7.91377
1975	8.13881
1980	7.38992
1985	6.64182
1990	6.05386
1995	5.93709
2000	5.95375
2005	5.99378
2010	5.58775
2015	5.5098
2020	5.77856
2025	5.73927
2030	5.70863
2035	5.54056
2040	5.37808
2045	5.286
2050	5.32433
2055	5.40388
2060	5.44073
2065	5.41913
2070	5.3486
2075	5.28292
2080	5.25382
2085	5.25675
2090	5.2513
2095	5.22219
2100	5.16145