Year	Percent
1950	13.88027
1955	12.95486
1960	13.34753
1965	13.6227
1970	14.04355
1975	13.90647
1980	14.09414
1985	14.51844
1990	14.30676
1995	13.91214
2000	13.90716
2005	14.47128
2010	14.26249
2015	13.82909
2020	13.83952
2025	13.75839
2030	13.44279
2035	13.04316
2040	12.66793
2045	12.29973
2050	11.93371
2055	11.55908
2060	11.17555
2065	10.82862
2070	10.48782
2075	10.16718
2080	9.84224
2085	9.54225
2090	9.23905
2095	8.964
2100	8.66844