Click here to report volumes in (Cubic Yards) or view data in graphically.
| Year | Amount Excluded | Number of Projects |
| 1977 |
473,899 |
3 |
| 1978 |
6,768,698 |
7 |
| 1979 |
1,349,135 |
6 |
| 1980 |
308,363 |
5 |
| 1981 |
1,641,061 |
5 |
| 1982 |
1,291,868 |
5 |
| 1983 |
1,259,449 |
4 |
| 1984 |
719,282 |
6 |
| 1985 |
1,449,911 |
7 |
| 1986 |
1,628,177 |
7 |
| 1987 |
5,640,760 |
19 |
| 1988 |
9,547,943 |
20 |
| 1989 |
11,563,357 |
33 |
| 1990 |
17,494,124 |
31 |
| 1991 |
7,451,715 |
35 |
| 1992 |
2,301,293 |
15 |
| 1993 |
3,417,533 |
10 |
| 1994 |
831,885 |
2 |
| 1995 |
1,114,099 |
2 |
| 1996 |
138,393 |
5 |
| 1997 |
941,528 |
2 |
| 1998 |
3,310,489 |
1 |
| 1999 |
4,967,683 |
13 |
| 2000 |
8,228,396 |
12 |
| 2001 |
7,692,717 |
18 |
| 2002 |
4,072,871 |
7 |
| 2003 |
2,343,499 |
12 |
| 2004 |
61,550 |
4 |
| 2005 |
2,204,495 |
5 |
| 2006 |
6,707,606 |
11 |
| 2007 |
798,472 |
5 |
| 2008 |
1,233,529 |
3 |
| 2009 |
44,117 |
1 |