Year	Percent
1950	8.00328
1955	9.26794
1960	8.44783
1965	8.26774
1970	8.03465
1975	8.26847
1980	7.63811
1985	6.34619
1990	6.06482
1995	6.52281
2000	6.86123
2005	6.61926
2010	6.09045
2015	6.12283
2020	5.73585
2025	5.80355
2030	5.77969
2035	5.68613
2040	5.57107
2045	5.4708
2050	5.4036
2055	5.38318
2060	5.38139
2065	5.35481
2070	5.29473
2075	5.22186
2080	5.16204
2085	5.12511
2090	5.09384
2095	5.06295
2100	5.01468