Year	Percent
1950	9.90007
1955	9.66748
1960	9.53544
1965	10.80708
1970	8.26516
1975	8.36662
1980	7.81279
1985	6.95643
1990	9.15039
1995	9.23089
2000	9.37535
2005	9.37795
2010	7.47561
2015	6.48557
2020	6.65611
2025	7.3372
2030	7.14802
2035	5.89619
2040	5.35288
2045	5.27648
2050	5.30453
2055	5.29614
2060	5.14578
2065	4.98822
2070	4.93549
2075	4.96157
2080	5.01404
2085	5.0301
2090	5.01584
2095	4.97957
2100	4.97179