Year	Percent
1950	9.40051
1955	9.105
1960	8.86748
1965	8.7172
1970	9.98179
1975	9.86601
1980	9.9355
1985	10.03313
1990	8.6728
1995	9.26967
2000	9.94334
2005	8.83061
2010	8.08649
2015	7.8667
2020	7.8319
2025	8.81017
2030	8.83215
2035	8.80196
2040	8.83115
2045	8.6874
2050	8.44798
2055	8.21307
2060	8.03048
2065	7.83444
2070	7.64225
2075	7.45031
2080	7.24551
2085	7.049
2090	6.84184
2095	6.65308
2100	6.46495