Year	Percent
1950	7.77587
1955	8.02526
1960	6.77328
1965	6.092
1970	6.16836
1975	6.91073
1980	6.66051
1985	5.79181
1990	6.34466
1995	5.97531
2000	6.78933
2005	7.30496
2010	5.66318
2015	3.92302
2020	4.19349
2025	5.14143
2030	5.07958
2035	4.97046
2040	4.77342
2045	4.443
2050	4.35166
2055	4.68103
2060	5.06812
2065	5.19129
2070	5.08514
2075	4.90989
2080	4.81289
2085	4.8814
2090	5.03803
2095	5.1375
2100	5.10104