Year	Percent
1950	12.36534
1955	12.77894
1960	12.2182
1965	10.94683
1970	11.64352
1975	12.03296
1980	13.65014
1985	14.04375
1990	13.32265
1995	12.63597
2000	11.87113
2005	11.44559
2010	11.23744
2015	10.87884
2020	10.77433
2025	10.62158
2030	9.84597
2035	9.17016
2040	8.63491
2045	8.26089
2050	7.97755
2055	7.65393
2060	7.26563
2065	6.85109
2070	6.51444
2075	6.2526
2080	6.05591
2085	5.87116
2090	5.67711
2095	5.48733
2100	5.33276