Year	Percent
1950	14.48997
1955	14.79132
1960	14.23128
1965	14.53594
1970	14.68301
1975	14.80933
1980	14.92637
1985	14.96116
1990	14.82022
1995	14.71609
2000	14.63958
2005	14.33919
2010	14.89451
2015	14.6997
2020	14.50735
2025	13.96753
2030	13.48552
2035	13.08656
2040	12.69601
2045	12.24451
2050	11.75928
2055	11.25841
2060	10.79257
2065	10.3697
2070	9.94926
2075	9.55274
2080	9.16181
2085	8.78499
2090	8.43493
2095	8.11549
2100	7.80557