| Maryland 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 | 31.1 | 45.0 | 48.0 | 57.5 | 55.8 | 73.2 | 92.7 | 94.9 | 76.1 | 82.5 | 66.3 | 39.1 | 47.7 | 26.4 | 18.5 | 11.5 | 19.1 | 6.4 | 20.3 | 44.3 | 11.7 |
| 180-300 | 64.5 | 51.6 | 40.1 | 37.2 | 41.0 | 26.8 | 3.2 | 5.1 | 23.9 | 17.5 | 27.4 | 60.9 | 52.3 | 69.8 | 81.5 | 84.7 | 71.3 | 93.6 | 66.0 | 37.4 | 77.6 |
| Above 300 | 4.3 | 3.4 | 11.9 | 5.3 | 3.1 | 0.0 | 4.1 | 0.0 | 0.0 | 0.0 | 6.2 | 0.0 | 0.0 | 3.8 | 0.0 | 3.8 | 9.6 | 0.0 | 13.7 | 18.3 | 10.7 |
| 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. |