Year	Percent
1950	12.44731
1955	12.51088
1960	12.43917
1965	12.76218
1970	12.96808
1975	13.2249
1980	12.79999
1985	12.47434
1990	12.50702
1995	12.82176
2000	12.22102
2005	11.89362
2010	11.12343
2015	10.31425
2020	10.80031
2025	10.0516
2030	9.67665
2035	9.25182
2040	8.8879
2045	8.59655
2050	8.2942
2055	8.00607
2060	7.72003
2065	7.42279
2070	7.15214
2075	6.90034
2080	6.67674
2085	6.45035
2090	6.23478
2095	6.03557
2100	5.86