Year	Percent
1950	9.95064
1955	9.01676
1960	8.50066
1965	8.56027
1970	8.65466
1975	8.96126
1980	9.14862
1985	8.61011
1990	8.88223
1995	8.29885
2000	7.21714
2005	5.96401
2010	5.75198
2015	5.57903
2020	5.56754
2025	5.31483
2030	4.90183
2035	4.38481
2040	4.16018
2045	4.26299
2050	4.4288
2055	4.52874
2060	4.51109
2065	4.41445
2070	4.33182
2075	4.36232
2080	4.47441
2085	4.59317
2090	4.64359
2095	4.62745
2100	4.58117