Table 4.4.—Value of the Resource, Additions, and Depletion of All Metals, Present Discounted Value Method Using 10% Discount Rate

[Billions of current dollars]

Year Opening stock Additions Depletion Revaluation adjustment Closing stock (1+2-3+4)
(1) (2)(3)(4)(5)
195838.3-0.10.30.438.4
195938.4-.1.31.439.5
196039.5-1.1.3.939.0
196139.01.1.31.441.1
196241.12.1.31.544.4
196344.4.8.41.846.6
196446.61.8.41.649.6
196549.61.3.41.451.8
196651.81.2.51.053.6
196753.61.2.41.355.7
196855.71.2.41.658.1
196958.1.1.62.259.8
197059.81.2.62.863.2
197163.22.0.63.067.6
197267.6.7.62.770.3
197370.30.75.374.9
197474.91.3.711.086.4
197586.4-1.1.814.298.7
197698.7.4.912.6110.9
1977110.91.7.89.2121.0
1978121.0.8.9-5.5115.4
1979115.41.0.9-5.3110.2
1980110.2-1.3.8-9.898.3
198198.3-2.9.7-18.776.0
198276.0-2.0.2-22.651.2
198351.2-1.4.428.678.0
198478.0-3.7.626.6100.2
1985100.24.3.822.6126.4
1986126.45.5.917.4148.3
1987148.35.51.317.2169.7
1988169.76.51.71.3175.7
1989175.78.72.26.1188.4
1990188.48.42.41.0195.3
1991195.38.12.3-.3200.8

Table 4.3