Table 9.--U.S. crushed stone sold or used by producers, by size of operation, 1977-80
                                     (Thousand metric tons unless otherwise specified)
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                                          1977                          1978                          1979
     Size range          ----------------------------- ----------------------------- -----------------------------
                          Number of                     Number of                     Number of
                         operations   Quantity Percent operations   Quantity Percent operations   Quantity Percent
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 Less than 24,999--------     2,148     13,161     2.0      1,465     11,943     1.0      1,171      9,922     1.0
 25,000 to 49,999--------       587     19,885     2.0        628     21,685     2.0        539     17,228     2.0
 50,000 to 74,999--------       343     18,875     2.0        317     17,673     2.0        328     18,469     2.0
 75,000 to 99,999--------       220     17,205     2.0        200     15,870     2.0        245     19,250     2.0
 100,000 to 199,999------       618     79,740     9.0        548     72,651     8.0        544     72,286     7.0
 200,000 to 299,999------       375     82,671    10.0        357     78,921     8.0        338     75,565     8.0
 300,000 to 399,999------       217     67,972     8.0        213     66,422     7.0        220     69,136     7.0
 400,000 to 499,999------       171     69,635     8.0        168     68,343     7.0        184     75,052     7.0
 500,000 to 599,999------       114     56,190     7.0        144     71,682     7.0        134     66,688     7.0
 600,000 to 699,999------        89     52,018     6.0        100     58,562     6.0        117     68,729     7.0
 700,000 to 799,999------        68     45,886     5.0         68     46,073     5.0         80     54,436     5.0
 800,000 to 899,999------        58     44,415     5.0         59     45,631     5.0         73     56,180     6.0
 900,000 to 999,999------       197    297,763    34.0        252    376,693    40.0        357    391,580    39.0
 1,000,000 and over------        --         --      --         --         --      --         --         --      --
                         -----------------------------------------------------------------------------------------
      Total1/------------     5,205    865,414   100.0      4,519    952,150   100.0      4,330    994,522   100.0
                         -----------------------------------------------------------------------------------------
                                          1980
                         -----------------------------
                         Number of
                         operations   Quantity Percent
                         -----------------------------
 Less than 24,999--------     1,264      9,512     1.0
 25,000 to 49,999--------       628     20,746     2.0
 50,000 to 74,999--------       291     16,272     2.0
 75,000 to 99,999--------       219     17,305     2.0
 100,000 to 199,999------       662     81,754     9.0
 200,000 to 299,999------       352     78,143     9.0
 300,000 to 399,999------       207     64,855     7.0
 400,000 to 499,999------       185     74,250     8.0
 500,000 to 599,999------       149     57,643     6.0
 600,000 to 699,999------       105     61,810     7.0
 700,000 to 799,999------        76     51,638     6.0
 800,000 to 899,999------        56     43,260     5.0
 900,000 to 999,999------        30     25,894     3.0
 1,000,000 and over------       171    289,175    33.0
                         -----------------------------
      Total1/------------     4,395    892,254   100.0
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   1/Data may not add to totals shown because of independent rounding and conversions to metric tons.