Year	Percent
1950	13.82557
1955	13.58486
1960	14.63675
1965	15.32591
1970	15.34912
1975	15.21916
1980	15.12305
1985	15.00463
1990	14.98393
1995	14.90471
2000	14.40247
2005	14.03055
2010	13.70374
2015	13.39189
2020	13.2317
2025	12.71949
2030	12.20423
2035	11.72873
2040	11.32323
2045	10.97289
2050	10.63429
2055	10.29637
2060	9.95782
2065	9.63879
2070	9.34433
2075	9.0689
2080	8.80646
2085	8.5639
2090	8.33711
2095	8.08764
2100	7.8707