Year	Percent
1950	7.63744
1955	8.92102
1960	7.59699
1965	7.98686
1970	8.93682
1975	8.61332
1980	7.2522
1985	6.30846
1990	6.65636
1995	6.95746
2000	6.80169
2005	6.172
2010	5.77845
2015	6.23267
2020	6.25201
2025	6.11791
2030	5.91073
2035	5.62555
2040	5.46871
2045	5.49519
2050	5.56991
2055	5.56687
2060	5.48118
2065	5.36031
2070	5.26835
2075	5.24134
2080	5.24702
2085	5.2356
2090	5.18345
2095	5.10178
2100	5.0255