Table 3.4.—Value of the Resource, Additions, and Depletion of Coal, 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)
195814.30.20.3-0.114.1
195914.1.2.3.514.6
196014.6.1.3.414.9
196114.9.4.3.315.3
196215.3.5.3.315.8
196315.8.5.4.416.4
196416.4.6.4-.616.0
196516.0.6.4-.515.7
196615.7.5.4-.515.3
196715.3.5.4-.514.9
196814.9.5.3015.0
196915.0.4.4.715.7
197015.7.5.41.717.5
197117.5.5.42.019.6
197219.6.6.51.821.5
197321.5.8.67.028.7
197428.71.6.913.142.4
197542.42.21.415.859.0
197659.02.71.912.272.1
197772.14.02.27.281.1
197881.1.72.23.783.4
197983.413.32.78.1102.0
1980102.07.93.18.4115.2
1981115.22.83.46.9121.6
1982121.66.83.75.0129.8
1983129.8.13.65.1131.4
1984131.45.74.32.9135.7
1985135.76.94.31.6139.9
1986139.96.54.41.0143.1
1987143.13.74.5-.7141.6
1988141.64.94.5-4.5137.5
1989137.53.84.5-3.4133.4
1990133.45.84.6-1.5133.1
1991133.13.94.4-1.0131.5

Table 3.3