Year	Percent
1950	6.30603
1955	6.46652
1960	6.92888
1965	7.79564
1970	6.80905
1975	7.24494
1980	8.42625
1985	8.10128
1990	6.77276
1995	5.87023
2000	6.14748
2005	6.56889
2010	6.31024
2015	5.77963
2020	5.37806
2025	5.83675
2030	5.90417
2035	5.82967
2040	5.66987
2045	5.42575
2050	5.29981
2055	5.34921
2060	5.44931
2065	5.46708
2070	5.39128
2075	5.27645
2080	5.19233
2085	5.17318
2090	5.18367
2095	5.17404
2100	5.12422