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Table 02. Average Number of EMPLOYEES at Sand and

Gravel Operations in the United States,

by Primary Activity, 1978-2007

 

SURFACE MINES

Year

Strip

Dredge

Total w/o Office

Office

Grand Total

1978

34,405

6,164

40,569

6,043

46,612

1979

37,934

6,005

43,939

6,204

50,143

1980

34,639

5,445

40,084

6,024

46,108

1981

30,936

4,789

35,725

5,769

41,494

1982

24,949

4,157

29,106

4,942

34,048

1983 1/

26,138

4,212

30,350

5,244

35,594

1984

27,891

4,360

32,251

5,409

37,660

1985

29,847

4,398

34,245

5,812

40,057

1986

30,327

4,424

34,751

6,076

40,827

1987

30,562

4,667

35,229

7,115

42,344

1988

30,767

4,738

35,505

6,751

42,256

1989

30,894

4,706

35,600

7,145

42,745

1990

31,048

4,851

35,899

7,369

43,268

1991

29,405

4,930

34,335

7,221

41,556

1992

28,748

4,653

33,401

7,317

40,718

1993

28,170

4,697

32,867

7,148

40,015

1994

29,530

4,849

34,379

7,337

41,716

1995

28,301

4,669

32,970

7,016

39,986

1996

28,643

4,509

33,152

6,814

39,966

1997

29,406

4,466

33,872

6,926

40,798

1998

31,121

4,545

35,666

7,080

42,746

1999

32,581

4,713

37,294

7,567

44,861

2000

33,185

4,652

37,837

7,398

45,235

2001

33,000

4,508

37,508

7,405

44,913

2002

32,578

4,477

37,055

7,196

44,251

2003

31,993

4,547

36,540

7,370

43,910

2004

31,970

5,030

37,000

7,467

44,467

2005

32,615

5,090

37,705

7,535

45,240

2006

33,320

5,130

38,450

7,619

46,069

2007

33,235

4,947

38,182

7,579

45,761

1/ Beginning in 1983, only operator data are available at this level of detail