Year	Percent
1950	12.32668
1955	12.24834
1960	11.09982
1965	11.78315
1970	11.94492
1975	11.97116
1980	12.00533
1985	12.19277
1990	12.41291
1995	12.66203
2000	12.14246
2005	11.6375
2010	12.1123
2015	12.4198
2020	12.15464
2025	11.68921
2030	11.3657
2035	11.09686
2040	10.80697
2045	10.47517
2050	10.11625
2055	9.74045
2060	9.37633
2065	9.03444
2070	8.70044
2075	8.39359
2080	8.078
2085	7.76971
2090	7.47654
2095	7.19451
2100	6.93329