Year	Percent
1950	8.91302
1955	8.59955
1960	8.71351
1965	8.73735
1970	9.14215
1975	9.38402
1980	8.567
1985	9.18226
1990	9.37642
1995	8.40512
2000	8.44419
2005	8.60959
2010	8.15599
2015	7.69114
2020	7.36251
2025	7.05995
2030	6.84721
2035	6.63877
2040	6.40906
2045	6.15449
2050	5.92264
2055	5.7438
2060	5.60685
2065	5.48801
2070	5.38114
2075	5.28394
2080	5.19911
2085	5.13153
2090	5.09083
2095	5.05539
2100	5.01439