Year	Percent
1950	6.751
1955	6.73668
1960	6.81849
1965	6.75183
1970	6.67521
1975	6.33227
1980	6.76373
1985	6.63425
1990	6.90858
1995	6.91148
2000	5.17941
2005	4.0505
2010	4.43472
2015	5.33007
2020	5.01378
2025	4.96346
2030	4.7281
2035	4.37537
2040	4.29256
2045	4.52594
2050	4.76617
2055	4.81259
2060	4.69821
2065	4.54958
2070	4.48159
2075	4.5599
2080	4.71008
2085	4.803
2090	4.7677
2095	4.64713
2100	4.54884