Year	Percent
1950	11.95946
1955	10.26672
1960	10.35708
1965	13.08124
1970	14.00273
1975	14.47819
1980	13.6223
1985	12.62953
1990	12.51999
1995	12.7595
2000	11.82153
2005	11.07441
2010	9.65937
2015	8.99764
2020	8.71859
2025	9.0132
2030	8.36562
2035	7.70859
2040	7.13605
2045	6.72784
2050	6.47626
2055	6.28934
2060	6.07353
2065	5.81022
2070	5.55153
2075	5.35239
2080	5.22927
2085	5.15703
2090	5.09384
2095	5.00988
2100	4.91685