Year	Percent
1950	8.96728
1955	9.12361
1960	9.36585
1965	10.31234
1970	10.34454
1975	11.0403
1980	10.65746
1985	10.46265
1990	9.88323
1995	10.18415
2000	10.09554
2005	8.87916
2010	8.29427
2015	7.97282
2020	8.21029
2025	8.32392
2030	7.69619
2035	7.19597
2040	6.73053
2045	6.51635
2050	6.52934
2055	6.50775
2060	6.27106
2065	5.92772
2070	5.64098
2075	5.50292
2080	5.48421
2085	5.50133
2090	5.43012
2095	5.2837
2100	5.14001