Year	Percent
1950	14.54549
1955	15.20315
1960	13.84018
1965	14.40502
1970	14.9467
1975	15.19914
1980	15.0014
1985	14.72584
1990	14.48608
1995	14.29346
2000	13.88349
2005	13.80233
2010	13.31908
2015	13.20678
2020	13.14591
2025	12.38636
2030	11.65743
2035	11.098
2040	10.71289
2045	10.37917
2050	10.06535
2055	9.69223
2060	9.27356
2065	8.89545
2070	8.58608
2075	8.30816
2080	8.0357
2085	7.75701
2090	7.48512
2095	7.21804
2100	6.98477