Year	Percent
1950	12.95398
1955	11.85974
1960	11.47897
1965	14.17375
1970	14.15015
1975	13.53275
1980	12.98699
1985	12.99525
1990	13.5979
1995	13.76884
2000	12.54438
2005	11.80729
2010	10.88227
2015	9.94998
2020	9.71451
2025	9.91787
2030	9.31199
2035	8.63045
2040	8.00838
2045	7.55999
2050	7.26528
2055	7.04088
2060	6.80653
2065	6.54922
2070	6.30664
2075	6.10648
2080	5.96869
2085	5.87096
2090	5.78714
2095	5.6915
2100	5.59612