Year	Percent
1950	7.28826
1955	8.12279
1960	9.25629
1965	9.7293
1970	10.02524
1975	9.3406
1980	8.12021
1985	7.21087
1990	6.90496
1995	7.12082
2000	7.35324
2005	7.30828
2010	6.74848
2015	6.47427
2020	6.33271
2025	5.84038
2030	5.91392
2035	5.97891
2040	5.93059
2045	5.82585
2050	5.71769
2055	5.63692
2060	5.60921
2065	5.62401
2070	5.61165
2075	5.55407
2080	5.48201
2085	5.4236
2090	5.39842
2095	5.38505
2100	5.36827