Year	Percent
1950	14.03361
1955	14.57881
1960	15.94325
1965	16.39525
1970	16.02811
1975	15.14383
1980	14.20787
1985	13.33331
1990	12.90752
1995	12.24731
2000	11.7025
2005	10.77282
2010	10.36683
2015	9.83661
2020	9.27339
2025	8.63859
2030	8.05957
2035	7.54642
2040	7.08552
2045	6.66591
2050	6.29138
2055	5.96149
2060	5.67683
2065	5.4394
2070	5.24463
2075	5.0861
2080	4.94705
2085	4.83413
2090	4.74003
2095	4.66739
2100	4.61251