Year	Percent
1950	14.83924
1955	17.65772
1960	18.05458
1965	18.22112
1970	18.44282
1975	18.67939
1980	18.75733
1985	18.32883
1990	18.10647
1995	18.19415
2000	18.14977
2005	17.24492
2010	16.32939
2015	15.49327
2020	15.04168
2025	14.5262
2030	13.8554
2035	13.11228
2040	12.43721
2045	11.86222
2050	11.34057
2055	10.83474
2060	10.31823
2065	9.82755
2070	9.37463
2075	8.93859
2080	8.54175
2085	8.15683
2090	7.78503
2095	7.44519
2100	7.10974