Table 4.3.—Value of the Resource, Additions, and Depletion of
All Metals, Present Discounted Value Method Using 3% Discount Rate
[Billions of current dollars]
| Year
| Opening stock
| Additions
| Depletion
| Revaluation adjustment
| Closing stock (1+2-3+4)
|
| (1) |
(2) | (3) | (4) | (5) |
| 1958 | 52.0 | -0.1 | 0.4 | 0.7 | 52.2 |
| 1959 | 52.2 | -.1 | .4 | 1.9 | 53.6 |
| 1960 | 53.6 | -1.7 | .5 | 1.5 | 52.9 |
| 1961 | 52.9 | 1.7 | .5 | 1.7 | 55.8 |
| 1962 | 55.8 | 3.3 | .5 | 1.7 | 60.2 |
| 1963 | 60.2 | 1.3 | .6 | 2.3 | 63.3 |
| 1964 | 63.3 | 2.8 | .6 | 1.9 | 67.3 |
| 1965 | 67.3 | 2.0 | .7 | 1.7 | 70.3 |
| 1966 | 70.3 | 1.9 | .7 | 1.3 | 72.7 |
| 1967 | 72.7 | 1.9 | .6 | 1.6 | 75.6 |
| 1968 | 75.6 | 1.8 | .7 | 2.1 | 78.8 |
| 1969 | 78.8 | .2 | .9 | 3.0 | 81.1 |
| 1970 | 81.1 | 1.9 | 1.0 | 3.7 | 85.8 |
| 1971 | 85.8 | 3.1 | .9 | 3.8 | 91.7 |
| 1972 | 91.7 | 1.1 | 1.0 | 3.6 | 95.4 |
| 1973 | 95.4 | -.1 | 1.1 | 6.9 | 101.2 |
| 1974 | 101.2 | 1.8 | 1.1 | 14.4 | 116.2 |
| 1975 | 116.2 | -1.6 | 1.2 | 18.8 | 132.3 |
| 1976 | 132.3 | .6 | 1.4 | 16.4 | 147.9 |
| 1977 | 147.9 | 2.4 | 1.3 | 11.7 | 160.7 |
| 1978 | 160.7 | 1.1 | 1.4 | -7.8 | 152.7 |
| 1979 | 152.7 | 1.4 | 1.3 | -7.6 | 145.2 |
| 1980 | 145.2 | -1.8 | 1.1 | -13.2 | 129.0 |
| 1981 | 129.0 | -4.1 | 1.0 | -24.6 | 99.4 |
| 1982 | 99.4 | -2.8 | .4 | -29.6 | 66.7 |
| 1983 | 66.7 | -2.0 | .6 | 37.0 | 101.1 |
| 1984 | 101.1 | -5.2 | .9 | 34.5 | 129.5 |
| 1985 | 129.5 | 6.1 | 1.2 | 28.2 | 162.6 |
| 1986 | 162.6 | 7.8 | 1.3 | 21.1 | 190.2 |
| 1987 | 190.2 | 7.7 | 1.8 | 20.6 | 216.7 |
| 1988 | 216.7 | 9.2 | 2.4 | .1 | 223.6 |
| 1989 | 223.6 | 12.3 | 3.1 | 6.9 | 239.7 |
| 1990 | 239.7 | 11.8 | 3.4 | .5 | 248.6 |
| 1991 | 248.6 | 11.5 | 3.3 | -1.2 | 255.6 |
Table 4.2
Table 4.4
