Year	Percent
1950	7.43301
1955	6.57338
1960	6.22433
1965	6.32763
1970	6.85254
1975	7.43623
1980	7.42349
1985	6.77832
1990	5.53236
1995	5.24264
2000	5.33348
2005	5.67239
2010	5.75211
2015	5.85547
2020	5.59792
2025	5.41071
2030	5.41
2035	5.62582
2040	5.58455
2045	5.50839
2050	5.44565
2055	5.36969
2060	5.33656
2065	5.36843
2070	5.40632
2075	5.39181
2080	5.34143
2085	5.2707
2090	5.20099
2095	5.14991
2100	5.11642