Table 5.1.—Value of the Resource, Additions, and Depletion of
Other Minerals, Current Rent Method I (Rate of Return)
[Billions of current dollars]
| Year
| Opening stock
| Additions
| Depletion
| Revaluation adjustment
| Closing stock (1+2-3+4)
|
| (1) |
(2) | (3) | (4) | (5) |
| 1958 | 15.0 | 0.2 | 0.1 | 0 | 15.0 |
| 1959 | 15.0 | .2 | .2 | .8 | 15.8 |
| 1960 | 15.8 | .1 | .2 | .8 | 16.6 |
| 1961 | 16.6 | .3 | .2 | .7 | 17.3 |
| 1962 | 17.3 | .3 | .2 | .6 | 18.1 |
| 1963 | 18.1 | .3 | .2 | .6 | 18.8 |
| 1964 | 18.8 | .5 | .2 | .1 | 19.1 |
| 1965 | 19.1 | .5 | .3 | -.1 | 19.3 |
| 1966 | 19.3 | .5 | .3 | .3 | 19.8 |
| 1967 | 19.8 | .4 | .3 | -.1 | 19.7 |
| 1968 | 19.7 | .2 | .3 | -1.6 | 18.0 |
| 1969 | 18.0 | 0 | .2 | -2.1 | 15.7 |
| 1970 | 15.7 | .1 | .2 | -1.8 | 13.8 |
| 1971 | 13.8 | .2 | .2 | -1.7 | 12.1 |
| 1972 | 12.1 | .2 | .1 | -.8 | 11.4 |
| 1973 | 11.4 | .1 | .2 | 1.3 | 12.6 |
| 1974 | 12.6 | .2 | .2 | 3.8 | 16.5 |
| 1975 | 16.5 | .3 | .3 | 4.0 | 20.4 |
| 1976 | 20.4 | .4 | .5 | 4.6 | 24.9 |
| 1977 | 24.9 | .7 | .6 | 1.7 | 26.8 |
| 1978 | 26.8 | .9 | .5 | -.5 | 26.6 |
| 1979 | 26.6 | .6 | .6 | 2.5 | 29.2 |
| 1980 | 29.2 | -.1 | .6 | 3.0 | 31.4 |
| 1981 | 31.4 | 0 | .6 | .9 | 31.7 |
| 1982 | 31.7 | -.2 | .4 | -5.2 | 25.9 |
| 1983 | 25.9 | -.1 | .5 | 2.7 | 28.0 |
| 1984 | 28.0 | -.1 | .6 | 4.1 | 31.4 |
| 1985 | 31.4 | .8 | .6 | -1.4 | 30.3 |
| 1986 | 30.3 | .6 | .4 | -2.1 | 28.4 |
| 1987 | 28.4 | .1 | .4 | 4.6 | 32.8 |
| 1988 | 32.8 | .2 | .5 | -.3 | 32.2 |
| 1989 | 32.2 | .4 | .5 | .7 | 32.8 |
| 1990 | 32.8 | .2 | .5 | .7 | 33.2 |
| 1991 | 33.2 | .3 | .5 | .9 | 33.9 |
Table 5.2
