Year	Percent
1950	10.84886
1955	9.80219
1960	11.35567
1965	12.70765
1970	12.92267
1975	13.0048
1980	13.02306
1985	13.29382
1990	13.5149
1995	13.72905
2000	13.38214
2005	12.22862
2010	12.45408
2015	12.34011
2020	12.15888
2025	11.29863
2030	10.77936
2035	10.33912
2040	9.97414
2045	9.5945
2050	9.16405
2055	8.72402
2060	8.33568
2065	7.97626
2070	7.64172
2075	7.32608
2080	7.01902
2085	6.71088
2090	6.43664
2095	6.20646
2100	5.99872