| U.S. Sales by Salt Institute Members by Type of Salt | ||||||||
| Source: Salt Institute Confidential Statistical Report of United States Sales | ||||||||
| (tons = short tons) | ||||||||
| Calendar Year | Rock | Solar | ||||||
| Tons (000) | $ (000) | Tons (000) | $ (000) | Tons (000) | $ (000) | |||
| 1977 | 3,839.1 | 228,863.6 | 15,889.4 | 162,333.9 | 3,672.9 | 55,820.8 | ||
| 1978 | 3,776.2 | 253,429.4 | 16,329.1 | 193,301.3 | 4,583.4 | 67,210.1 | ||
| 1979 | 3,949.3 | 283,994.7 | 16,005.7 | 219,887.4 | 4,744.3 | 70,647.5 | ||
| 1980 | 3,802.9 | 306,640.2 | 11,804.8 | 183,485.5 | 4,378.8 | 72,630.1 | ||
| 1981 | 3,705.4 | 321,223.3 | 12,729.7 | 187,884.5 | 4,897.8 | 91,197.9 | ||
| 1982 | 3,757.7 | 338,114.5 | 14,747.2 | 215,034.1 | 4,410.1 | 94,289.0 | ||
| 1983 | 3,640.5 | 330,153.8 | 11,319.8 | 180,157.9 | 3,470.6 | 88,502.9 | ||
| 1984 | 4,521.6 | 331,136.1 | 12,220.7 | 203,077.3 | 4,106.5 | 108,296.3 | ||
| 1985 | 3,681.6 | 344,687.2 | 16,119.4 | 282,864.9 | 4,879.8 | 119,538.1 | ||
| 1986 | 3,679.8 | 339,848.9 | 14,683.6 | 254,368.1 | 4,872.9 | 122,433.9 | ||
| 1987 | 3,904.9 | 351,197.2 | 13,894.3 | 228,831.7 | 4,753.8 | 129,569.7 | ||
| 1988 | 3,994.6 | 364,750.7 | 15,822.2 | 259,825.4 | 4,904.3 | 131,706.5 | ||
| 1989 | 4,470.5 | 398,238.1 | 16,425.9 | 295,641.8 | 5,058.9 | 146,905.7 | ||
| 1990 | 4,444.5 | 420,508.5 | 14,863.3 | 299,371.2 | 5,376.6 | 168,312.8 | ||
| 1991 | 4,435.6 | 443,504.6 | 14,508.4 | 295,309.2 | 4,863.1 | 171,248.9 | ||
| 1992 | 4,478.7 | 449,183.9 | 13,065.8 | 270,419.6 | 4,677.7 | 176,381.9 | ||
| 1993 | 4,427.1 | 455,374.2 | 19,395.2 | 378,493.9 | 5,119.8 | 188,616.7 | ||
| 1994 | 4,441.5 | 471,352.2 | 21,148.7 | 474,595.6 | 5,970.2 | 222,293.5 | ||
| 1995 | 4,413.1 | 479,556.6 | 17,490.4 | 405,136.2 | 5,099.8 | 203,671.2 | ||
| 1996 | 4,392.8 | 487,035.5 | 21,919.9 | 529,875.3 | 6,575.7 | 259,540.2 | ||
| 1997 | 4,528.7 | 502,003.6 | 19,186.6 | 462,457.1 | 5,728.4 | 244,891.9 | ||
| 1998 | 4,505.9 | 502,534.2 | 12,990.2 | 300,024.7 | 5,150.3 | 231,338.3 | ||
| 1999 | 4,560.3 | 508,179.3 | 18,567.9 | 403,082.2 | 5,084.5 | 233,799.0 | ||
| 2000 | 4,428.7 | 496,050.1 | 20,523.0 | 430,501.1 | 4,967.7 | 231,569.8 | ||
| 2001 | 4,326.0 | 507,951.7 | 18,548.1 | 420,878.5 | 5,539.2 | 252,513.0 | ||
| 2002 | 4,291.7 | 524,246.9 | 15,652.6 | 399,967.1 | 4,562.9 | 251,263.0 | ||
| 2003 | 4,226.2 | 527,196.4 | 20.764.8 | 528,199.1 | 5,611.6 | 276,809.4 | ||
| 2004 | 4,302.8 | 544,403.9 | 17,479.6 | 444,111.3 | 5,881.5 | 283,533.3 | ||
| 2005 | 4,362.8 | 569,670.0 | 21,558.0 | 580.178.1 | 6,134.4 | 322,837.5 | ||
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