Year	Percent
1950	7.88968
1955	8.94849
1960	9.94739
1965	10.38282
1970	10.84319
1975	10.37861
1980	9.05003
1985	8.53289
1990	8.07563
1995	7.75562
2000	7.28837
2005	7.76229
2010	6.69036
2015	6.38582
2020	6.57906
2025	6.31969
2030	5.97017
2035	5.75842
2040	5.51427
2045	5.32217
2050	5.2334
2055	5.19413
2060	5.12656
2065	5.02163
2070	4.92087
2075	4.83779
2080	4.78748
2085	4.76353
2090	4.74137
2095	4.70649
2100	4.65778