Year	Percent
1950	9.85331
1955	9.75499
1960	9.61961
1965	9.4948
1970	9.58179
1975	9.75744
1980	10.02769
1985	10.33078
1990	10.71209
1995	10.91082
2000	10.57281
2005	10.10224
2010	9.62344
2015	9.80374
2020	10.28798
2025	10.85245
2030	10.77287
2035	10.08788
2040	9.77056
2045	9.71849
2050	9.70465
2055	9.53236
2060	9.21498
2065	8.89954
2070	8.6577
2075	8.4583
2080	8.26947
2085	8.03835
2090	7.78973
2095	7.5593
2100	7.3471