Year	Percent
1950	7.37885
1955	6.65584
1960	7.75745
1965	8.7435
1970	7.6589
1975	7.57487
1980	8.29751
1985	8.0691
1990	6.83092
1995	5.92056
2000	6.11317
2005	6.12553
2010	6.0989
2015	5.41927
2020	5.03902
2025	4.95549
2030	5.13356
2035	5.29848
2040	5.21434
2045	5.04889
2050	4.89349
2055	4.84251
2060	4.91466
2065	5.03849
2070	5.10403
2075	5.08172
2080	4.9999
2085	4.92634
2090	4.89284
2095	4.89226
2100	4.89792