Year	Percent
1950	9.6383
1955	9.579
1960	9.77604
1965	9.47512
1970	10.80679
1975	10.84327
1980	10.90483
1985	11.05309
1990	10.8724
1995	10.47074
2000	10.2761
2005	10.26736
2010	9.9056
2015	9.44447
2020	8.83021
2025	8.62888
2030	8.36278
2035	7.99376
2040	7.61388
2045	7.25076
2050	6.92517
2055	6.62971
2060	6.35643
2065	6.10729
2070	5.88054
2075	5.6865
2080	5.52268
2085	5.38582
2090	5.27586
2095	5.17974
2100	5.09875