Year	Percent
1950	6.48939
1955	8.09644
1960	8.49177
1965	7.17216
1970	6.80105
1975	7.08974
1980	7.27644
1985	6.89631
1990	6.0162
1995	5.89005
2000	6.72487
2005	6.9477
2010	5.34099
2015	5.46536
2020	5.93542
2025	5.82861
2030	5.9839
2035	5.96061
2040	5.70733
2045	5.48323
2050	5.48891
2055	5.59751
2060	5.67025
2065	5.6612
2070	5.57011
2075	5.45448
2080	5.3947
2085	5.40145
2090	5.42022
2095	5.39814
2100	5.33266