Year	Percent
1950	9.99777
1955	9.6346
1960	9.74641
1965	8.72159
1970	10.5678
1975	10.64668
1980	10.81191
1985	10.74215
1990	11.01129
1995	11.82686
2000	12.5628
2005	12.28304
2010	11.45233
2015	10.47049
2020	10.16635
2025	10.6521
2030	11.04971
2035	10.25257
2040	9.53211
2045	9.06381
2050	8.80175
2055	8.53589
2060	8.20595
2065	7.81872
2070	7.40466
2075	7.05055
2080	6.75349
2085	6.51583
2090	6.2971
2095	6.07807
2100	5.88862