Year	Percent
1950	6.75259
1955	6.66586
1960	7.46913
1965	8.92339
1970	8.67491
1975	8.93218
1980	8.92066
1985	8.30744
1990	8.17908
1995	7.05869
2000	6.87251
2005	6.88362
2010	6.72375
2015	6.22004
2020	5.97674
2025	6.31733
2030	6.34348
2035	6.41467
2040	6.17899
2045	5.93775
2050	5.76644
2055	5.73625
2060	5.77462
2065	5.78548
2070	5.71208
2075	5.59186
2080	5.47646
2085	5.39916
2090	5.36344
2095	5.32968
2100	5.27689