Table 4.--U.S. imports for consumption of sodium sulfate (Thousand metric tons and thousand dollars) --------------------------------------------------------------------------------------------- Disodium sulfate, Disodium sulfate, salt cake1/,2/ other4/ Total2/,5/ Year --------------------- --------------------- ---------------------- Quantity Value3/ Quantity Value3/ Quantity Value3/ --------------------------------------------------------------------------------------------- 1970--------------- 220 4,224 24 529 244 4,753 1971--------------- 214 4,108 29 559 243 4,667 1972--------------- 205 4,082 66 1,275 271 5,357 1973--------------- 218 4,054 73 1,602 290 5,656 1974--------------- 251 7,162 89 3,220 340 10,382 1975--------------- 184 8,305 74 4,319 258 12,624 1976--------------- 194 10,360 93 5,751 287 16,111 1977--------------- 110 5,702 93 5,528 202 11,230 1978--------------- 37 1,701 87 4,890 123 6,591 1979--------------- 77 3,763 94 5,748 171 9,511 1980--------------- 88 4,872 121 8,370 209 13,242 1981--------------- 123 8,038 126 11,097 249 19,135 1982--------------- 191 13,820 167 14,938 357 28,758 1983--------------- 131 10,312 181 17,609 311 27,921 1984--------------- 55 4,223 185 16,975 240 21,198 1985--------------- 36 2,549 141 11,943 177 14,492 1986--------------- 29 1,885 142 11,944 171 13,829 1987--------------- 34 2,189 92 8,173 125 10,363 1988--------------- 27 1,930 109 10,034 136 11,962 1989--------------- 41 3,350 132 10,641 173 13,990 1990--------------- 40 3,277 122 9,879 162 13,155 --------------------------------------------------------------------------------------------- 1/Beginning in 1989, import data were reclassified under the Harmonized Tariff System. salt cake is HTS No. 2833.11.1000. In prior years, salt cake was under TSUSA No. 4214200. 2/Includes Glauber's salt as follows: 1985--none, 1986--38 tons ($9,175), 1987--666 tons ($38,318), and 1988--604 tons ($16,963). TSUSA No. was 4214600. 3/Customs, insurance, and freight (c.i.f.) value at U.S. port. 4/Harmonized Tariff System No. 2833.11.5000 beginning in 1989; TSUSA No. 4214400 for prior years. 5/Data may not add to totals shown because of independent rounding. Source: Bureau of the Census.