Year	Percent
1950	9.98081
1955	9.84469
1960	9.57123
1965	9.3609
1970	10.10096
1975	10.02883
1980	9.97648
1985	10.15691
1990	10.63748
1995	10.95126
2000	11.33126
2005	11.08511
2010	10.6788
2015	10.23114
2020	10.16771
2025	10.55999
2030	10.77354
2035	10.31981
2040	9.87742
2045	9.55401
2050	9.35459
2055	9.19671
2060	8.99952
2065	8.74911
2070	8.46046
2075	8.18482
2080	7.95136
2085	7.74773
2090	7.54098
2095	7.33139
2100	7.11869