Year	Percent
1950	9.79309
1955	8.86495
1960	8.62081
1965	8.37573
1970	8.504
1975	7.72734
1980	6.39244
1985	6.11771
1990	6.60151
1995	6.95744
2000	6.70694
2005	6.22516
2010	6.26334
2015	5.94146
2020	6.01109
2025	5.97045
2030	5.84775
2035	5.70402
2040	5.5843
2045	5.5067
2050	5.47593
2055	5.46413
2060	5.42924
2065	5.36291
2070	5.28378
2075	5.215
2080	5.16871
2085	5.13049
2090	5.09482
2095	5.04119
2100	4.97889