MINERALS IN THE WORLD ECONOMY—1991  53TABLE 40 
 
 
LEADING WORLD PRODUCERS OF NATURAL DIAMOND' 
 
(Thousand carats) 
 
Country 
 1987 1988 1989 1990 
1991" 
 
Australia 
 30,333 34,826 35,080 34,662 19,425 18,163 17,755 ' 19,427 13,208 15,229
15,252 17,352 14,800 15,000 15,000 15,000 9,053 8,504 9,1 16 ' 8,708 500
533 500 ' 1,500 190 1 ,000 1 ,245 ' 1 ,300 1,021 938 927 ' 761 1,000 1 ,000
1 ,000 1 ,000 465 259 287 637 ' 89,995 ' 95,452 ' 96,162 ' 100,347 ' 1,493
' 1,019 ' 1,300 ' 1,219 ' 91,488 ' 96,471 ' 97,462 ' 101,566 
235,956 
 
20,000 
 
18,000 
 
15,000 
 
8,412 
 
1,500 
 
1 ,300 
 
21,194 
 
1,000 
 
700 
 
103,062 
 
1,324 
 
104,386 
34,171 
 
18,954 
 
15,808 
 
14,960 
 
8,759 
 
907 
 
1,007 
 
968 
 
1,000 
 
470 
 
97,004 
 
1,271 
 
98,275 
Zaire 
 
 
 
Botswana 
 
 
 
U.S.S.R." 
 
 
 
South Africa, Republic of 
 
 
 
Brazil 
 
 
 
Angola" 
 
 
 
Namibia 
 
 
 
China 
 
 
 
Ghana 
 
 
 
Total 
 
 
 
Other 
 
 
 
Grandtotal 
 
 
 
"Estimated. ' Revised. 
 
 
 
' Gem and industrial grades undifferentlated. 
Table includes data available through May 19, 1992. 
 
 
' Reported figure. 
 
 
 
 
TABLE 41 
 
LEADING WORLD PRODUCERS OF NITROGEN IN AMMONIA' 
 
 
 
(Fhousand metric tons, N content) 
 
 
Country 
 1987 1988 1989 1990 
1991" 
 
China 
 ' 16,000 ' 16,500 17,000 ' 17,500 20,000 20,200 r19,400 ' 18,200 12,004
12,544 ' 12,280 r12,525 5,300 6,205 6,661 7,022 2,887 3,289 ' 3,339 ' 3,054
2,287 ' 2,699 ' 2,906 ' 3,194 2,364 2,367 2,526 ' 2,600 3,107 2,980 2,882
2,671 1,743 2,067 2,100 2,164 2,177 2,338 ' 2,360 ' 2,006 2,029 1,832 1,476
1,586 1,128 1,386 "1,514 1,520 1,556 1,524 1,539 1,531 1,070 1,342 "1,300
rl,309 1,179 1,173 "1,175 1,180 1,435 1,561 1,446 1,197 ' 2,788 2,800
2,600
1,900 1,415 1,105 1,037 1,148 ' 80,468 ' 83,912 r83,542 ' 82,306 ' 14,636
r15,363 ' 15,509 ' 15,239 ' 95,104 ' 99,275 ' 99,051 ' 97,545 
18,000 
 
17,100 
 
212,692 
 
7,044 
 
3,016 
 
3,000 
 
2,500 
 
2,348 
 
2,221 
 
1,669 
 
1,604 
 
1,595 
 
' 1,553 
 
1,300 
 
1,185 
 
1,147 
 
1,130 
 
866 
 
79,970 
 
13,742 
 
93,712 
17,000 
 
18,980 
 
12,409 
 
6,446 
 
3,117 
 
2,817 
 
2,471 
 
7,024 
 
2,059 
 
2,110 
 
1,705 
 
1,429 
 
1,541 
 
1,264 
 
1,178 
 
1,357 
 
2,244 
 
1,114 
 
86,266 
 
14,898 
 
101,164 
U.S.S.R. 
 
 
 
UnitedStates 
 
 
 
India' 
 
 
 
Canada 
 
 
 
Netherlands 
 
 
 
Indonesia 
 
 
 
Germany' 
 
 
 
Mexico 
 
 
 
Poland 
 
 
 
France 
 
 
 
TriidadandTobago 
 
 
 
Japan 
 
 
 
Bulgaria 
 
 
 
Pakistan 
 
 
 
Italy 
 
 
 
Romania' 
 
 
 
UnitedKingdom 
 
 
 
Total' 
 
 
 
Other 
 
 
 
Grand total 
 
 
 
' Radniated. ' Revised. 
~1ab1e inch*s data available through May 20, 1992. ~— figw~ 
' Data sic for years beginning Apr. 1 of that stated. 4lneh,dcs both Eastern
and Western states. ' Data n~y not add to totals shown don to independent
rounding.