Year	Percent
1950	10.05586
1955	9.74962
1960	9.24973
1965	8.56616
1970	9.86176
1975	10.50844
1980	10.51921
1985	10.28974
1990	10.19434
1995	10.48425
2000	11.10109
2005	11.21329
2010	10.77414
2015	10.38755
2020	10.2269
2025	10.28128
2030	10.33153
2035	10.00828
2040	9.62996
2045	9.29522
2050	9.04434
2055	8.84353
2060	8.6331
2065	8.39325
2070	8.1165
2075	7.86461
2080	7.63377
2085	7.44199
2090	7.23149
2095	7.01228
2100	6.79827