| Montana Nonmetallic minerals 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 | 65.6 | 75.0 | 94.0 | 85.1 | 90.8 | 86.5 | 52.8 | 64.7 | 100.0 | 92.2 | 94.4 | 87.7 | 73.6 | 79.4 | 82.7 | 78.5 | 86.5 | ||||
| 180-300 | 30.8 | 25.0 | 6.0 | 14.9 | 9.2 | 10.4 | 47.2 | 35.3 | 0.0 | 7.8 | 5.6 | 12.3 | 26.4 | 17.4 | 17.3 | 19.7 | 13.5 | ||||
| Above 300 | 3.6 | 0.0 | 0.0 | 0.0 | 0.0 | 3.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 3.2 | 0.0 | 1.9 | 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. |