Year	Percent
1950	10.10895
1955	9.28956
1960	8.41153
1965	7.83401
1970	7.60602
1975	7.76739
1980	7.65509
1985	6.77741
1990	6.31394
1995	5.01198
2000	4.02137
2005	4.2738
2010	4.82898
2015	4.67523
2020	4.64122
2025	4.51728
2030	4.31733
2035	4.24421
2040	4.43584
2045	4.6642
2050	4.73946
2055	4.7008
2060	4.63124
2065	4.61523
2070	4.70111
2075	4.83901
2080	4.92635
2085	4.90726
2090	4.82161
2095	4.74527
2100	4.73065