Year	Percent
1950	9.53665
1955	8.75597
1960	12.10131
1965	13.27571
1970	12.0928
1975	9.50058
1980	9.61308
1985	9.54395
1990	10.13506
1995	10.28218
2000	8.27802
2005	6.15078
2010	5.51226
2015	5.67614
2020	5.93277
2025	5.37177
2030	4.87551
2035	4.56097
2040	4.38429
2045	4.44401
2050	4.60255
2055	4.66663
2060	4.59998
2065	4.51908
2070	4.52832
2075	4.64945
2080	4.81262
2085	4.91773
2090	4.90966
2095	4.83659
2100	4.78734