Year	Percent
1950	14.87092
1955	15.07421
1960	15.95362
1965	15.8159
1970	16.29366
1975	13.49148
1980	12.137
1985	10.68781
1990	9.87783
1995	8.76123
2000	9.37871
2005	8.23966
2010	7.81292
2015	6.58806
2020	5.5799
2025	5.34007
2030	5.35471
2035	5.41888
2040	5.3186
2045	5.08038
2050	4.83323
2055	4.71871
2060	4.76893
2065	4.86914
2070	4.90279
2075	4.85176
2080	4.76794
2085	4.73509
2090	4.78081
2095	4.86306
2100	4.91195