TABLE 15
RATES OF GROWTH IN DOMESTIC COPPER ORE (MINE RECOVERABLE
content) production by decade, 1860-1960
(Production in Short Tons)
Period
Average
Production
Percent
Increase
Over
Previous
Decade
No. Yrs.
Output
Advanced,
Declined
Over
Previous
Year's
Levels of
Production
Adv.
Dec.
Lowest
Highest
1951-1960
968,954
9.8
5
5
824,846
(1959)
1,104,156
(1956)
191+1-1950
882,868
69.7
5
5
608,737
(1946)
1,090,818
(1943)
1931-1940
520,220
29.6
6
4
190,643
(1933)
878,086
(1940)
1921-1930
739,154
3.0
7
3
233,095
(1921)
997,555
(1929)
1911-1920
762,207
77.3
6
4
557,382
(1911)
1,002,938
(1916)
1901-1910
429,834
97.7
7
3
301,036
(1901)
563,261
(1909)
1891-1900
217,436
165.0
9
1
142,061
(1891)
303,059
(1900)
1881-1890
82,041
280. 5
9
1
35,840
(1881)
129,882
(1890)
1871-1880
21,560
97.3
9
1
14,000
(1872)
30,240
(1880)
1861-1870
10,926
n/a
8
2
8,400
(1861)
14,112
(1870)
Source: Computed on data in Historical Statistics, p. 368, Series M 225 AND
Minerals Yearbook, 1965. p. 356*
178