Year	Percent
1950	13.12758
1955	13.38432
1960	12.39549
1965	12.5857
1970	12.74279
1975	12.91102
1980	12.80369
1985	12.60217
1990	12.83685
1995	12.84378
2000	12.32844
2005	12.46607
2010	12.96729
2015	13.31791
2020	13.47123
2025	13.41344
2030	13.32631
2035	13.26415
2040	13.14385
2045	12.95159
2050	12.69529
2055	12.37427
2060	12.00034
2065	11.59529
2070	11.17275
2075	10.73414
2080	10.27746
2085	9.86623
2090	9.43378
2095	9.04157
2100	8.66986