Year	Percent
1950	9.02112
1955	8.45068
1960	8.43855
1965	8.85626
1970	9.05707
1975	8.89185
1980	8.37474
1985	8.30981
1990	8.7718
1995	9.7725
2000	9.09362
2005	8.92717
2010	8.72885
2015	8.22313
2020	8.16435
2025	7.94446
2030	7.79778
2035	7.50918
2040	7.21578
2045	6.95716
2050	6.72042
2055	6.50795
2060	6.31605
2065	6.14084
2070	5.97036
2075	5.81836
2080	5.69752
2085	5.59179
2090	5.50778
2095	5.42794
2100	5.35026