---------------------+------------+-------------------------------------- | | Sales Year | Production +------------+------------+------------ | | Quantity | Value | Unit value ---------------------+------------+------------+------------+------------ | _Pounds_ | _Pounds_ | | Coal-tar resins:[1] | | | | 1921 | 1,643,796 | 1,674,456 | $1,352,166 | $0.81 1922 | 5,944,133 | 6,415,931 | 4,315,196 | .67 1923-26 | ([2]) | | | 1927 | 13,452,230 | 13,084,313 | 6,094,656 | .47 1928 | 20,411,465 | 20,778,856 | 7,211,958 | .35 1929 | 33,036,490 | 30,660,513 | 10,393,397 | .33 1930 | 30,867,752 | 24,014,093 | 7,323,656 | .30 1931 | 34,179,000 | 29,343,000 | 7,862,000 | .27 1932 | 29,039,000 | 23,891,000 | 5,001,000 | .21 1933 | 41,628,485 | 31,657,653 | 7,238,560 | .23 1934 | 56,059,489 | 43,350,876 | 10,126,849 | .23 1935 | 90,913,162 | 65,923,334 | 12,777,195 | .19 1936 |117,301,780 | 86,213,735 | 17,056,099 | .20 1937 |141,098,844 |108,284,175 | 20,165,064 | .19 | | | | Non-coal-tar resins: | | | | 1932 | 1,898,000 | 1,787,000 | 796,000 | .45 1933 | 3,571,717 | 3,256,411 | 1,745,102 | .54 1934 | ([2]) | 3,500,829 | 1,491,145 | .43 1935 | ([2]) | ([2]) | ([2]) | 1936 | 15,611,041 | 14,766,640 | 3,591,467 | .24 1937 | 21,005,869 | 18,891,277 | 5,680,600 | .30 ---------------------+------------+------------+------------+------------ [1] Does not include resins from adipic acid, coumarone and indene, hydrocarbon, polystyrene, succinic acid and sulfonamides. With the exception of coumarone and indene resins in recent years production of the resins not included was small. [2] Not publishable. Figures would reveal operations of individual producers. Source: Compiled from annual reports of the Tariff Commission on dyes and other synthetic organic chemicals in the United States. Many factors have contributed to the growth of the synthetic resin industry. Among these are the intensive research and development work carried on by many individuals and firms; their widespread application in many fields competing with wood, metal, and glass; and the development of processes for raw materials which have greatly reduced their cost and made their wider use possible.