Year	Percent
1950	12.45726
1955	12.92331
1960	13.02944
1965	13.27102
1970	13.99423
1975	13.28801
1980	12.34795
1985	11.24496
1990	11.60098
1995	11.83085
2000	11.03655
2005	9.74974
2010	9.1346
2015	9.005
2020	9.44681
2025	9.08042
2030	8.46393
2035	7.97889
2040	7.69571
2045	7.50285
2050	7.26615
2055	6.99873
2060	6.72815
2065	6.46834
2070	6.24164
2075	6.05376
2080	5.91188
2085	5.78217
2090	5.64377
2095	5.51956
2100	5.40443