| Iowa Potassium or Sodium Compounds routes: Tonnage by R/VC Category |
| Percentage of Tonnage |
| 1985 | 1986 | 1987 | 1988 | 1989 | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Below 180 | 69.6 | 60.8 | 94.0 | 83.2 | 94.2 | 73.7 | 84.8 | 80.1 | 62.0 | 54.2 | 78.6 | 91.8 | 93.6 | 92.5 | 96.4 | 98.1 | 64.9 | 77.8 | 93.7 | 92.8 | 88.5 |
| 180-300 | 21.3 | 34.7 | 3.4 | 14.1 | 5.8 | 3.3 | 2.0 | 10.1 | 9.6 | 20.3 | 15.8 | 5.2 | 3.9 | 3.8 | 3.6 | 1.9 | 35.1 | 16.5 | 3.1 | 7.2 | 11.5 |
| Above 300 | 9.0 | 4.5 | 2.6 | 2.7 | 0.0 | 23.0 | 13.2 | 9.8 | 28.4 | 25.5 | 5.7 | 3.0 | 2.6 | 3.7 | 0.0 | 0.0 | 0.0 | 5.7 | 3.2 | 0.0 | 0.0 |
| Includes only data that met statistical confidence and confidentialty reporting requirements. |
| For more information, see the Scope and Methodology for this product. |
| Amounts shown as 0.0 represent instances where reported amounts were greater than 0 but less than 0.05 |
| Information on this page was updated on February 1, 2008. |