| Nonmetallic minerals: 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 | 64.7 | 65.3 | 74.8 | 71.5 | 80.8 | 79.5 | 79.1 | 76.5 | 72.2 | 69.3 | 69.4 | 68.8 | 69.2 | 65.8 | 61.4 | 61.2 | 64.8 | 58.8 | 62.4 | 66.3 | 67.4 |
| 180-300 | 33.9 | 32.9 | 24.0 | 27.5 | 18.3 | 19.4 | 20.3 | 21.9 | 26.0 | 28.5 | 29.2 | 30.2 | 29.1 | 32.8 | 36.8 | 36.6 | 32.8 | 38.2 | 35.1 | 32.1 | 30.3 |
| Above 300 | 1.5 | 1.9 | 1.2 | 1.0 | 0.8 | 1.1 | 0.6 | 1.5 | 1.9 | 2.2 | 1.4 | 1.0 | 1.6 | 1.4 | 1.8 | 2.2 | 2.4 | 3.0 | 2.5 | 1.6 | 2.2 |
| 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. |