Year	Percent
1950	9.45975
1955	9.43424
1960	9.33996
1965	9.05841
1970	9.31564
1975	9.67318
1980	9.90547
1985	9.95102
1990	10.06177
1995	10.36031
2000	10.71573
2005	10.85763
2010	10.81824
2015	11.3512
2020	11.82297
2025	11.51765
2030	10.91396
2035	10.19448
2040	10.21052
2045	10.23988
2050	9.98637
2055	9.49245
2060	8.98814
2065	8.60593
2070	8.31128
2075	8.05118
2080	7.76281
2085	7.45666
2090	7.15005
2095	6.87987
2100	6.66587