Year	Percent
1950	12.63183
1955	15.23884
1960	16.26623
1965	17.54051
1970	19.0432
1975	20.02795
1980	19.99648
1985	19.73539
1990	18.97715
1995	16.25394
2000	16.66579
2005	17.15959
2010	17.37771
2015	15.23987
2020	13.62997
2025	12.67582
2030	12.04181
2035	11.44954
2040	10.75189
2045	9.98061
2050	9.20849
2055	8.54162
2060	7.99931
2065	7.5305
2070	7.10646
2075	6.69296
2080	6.30957
2085	5.97591
2090	5.70368
2095	5.49756
2100	5.32772