Year	Percent
1950	8.12719
1955	7.03936
1960	7.9204
1965	8.23494
1970	8.83941
1975	8.4357
1980	6.03829
1985	5.40274
1990	5.72351
1995	6.02574
2000	5.38865
2005	5.10305
2010	4.67979
2015	4.47848
2020	4.53417
2025	4.70264
2030	4.78112
2035	4.67122
2040	4.49435
2045	4.38995
2050	4.41159
2055	4.5458
2060	4.68673
2065	4.74346
2070	4.70657
2075	4.63999
2080	4.60514
2085	4.63461
2090	4.68221
2095	4.71279
2100	4.69436