Year	Percent
1950	9.10486
1955	9.24526
1960	9.11827
1965	9.40726
1970	9.49686
1975	8.81879
1980	9.16788
1985	9.31642
1990	8.3553
1995	8.31533
2000	8.39215
2005	7.94431
2010	7.46129
2015	7.12806
2020	6.8493
2025	6.6308
2030	6.42159
2035	6.19085
2040	5.93835
2045	5.71095
2050	5.53588
2055	5.4005
2060	5.28019
2065	5.16994
2070	5.06923
2075	4.98126
2080	4.90998
2085	4.86475
2090	4.82981
2095	4.79163
2100	4.76319