Year	Percent
1950	6.11143
1955	7.58639
1960	7.4035
1965	7.69295
1970	7.82495
1975	7.06791
1980	6.35911
1985	5.77266
1990	5.68516
1995	5.68932
2000	5.753
2005	5.40957
2010	5.28883
2015	5.56054
2020	5.52022
2025	5.51409
2030	5.37856
2035	5.21354
2040	5.11572
2045	5.14567
2050	5.21921
2055	5.25403
2060	5.23648
2065	5.17413
2070	5.11634
2075	5.09314
2080	5.10173
2085	5.10185
2090	5.077
2095	5.0179
2100	4.95116