Year	Percent
1950	12.23356
1955	12.69324
1960	13.64127
1965	13.76002
1970	13.9113
1975	14.07895
1980	15.20884
1985	15.40006
1990	13.87355
1995	13.65711
2000	13.51205
2005	12.97122
2010	12.21003
2015	11.62404
2020	11.97163
2025	11.42143
2030	10.77408
2035	10.11007
2040	9.54271
2045	9.09027
2050	8.70437
2055	8.29685
2060	7.84921
2065	7.41211
2070	7.03468
2075	6.72315
2080	6.46419
2085	6.23723
2090	6.01091
2095	5.80555
2100	5.63386