Year

Underground

Mines

Surface Mines

Grand

Total

Strip

Auger

Culm Bank

Dredge

Total

1978

424,554

1,990,267

-

1,533,923

5,967

3,530,157

3,954,711

1979

395,705

2,119,135

-

1,541,130

5,222

3,665,487

4,061,192

1980

524,795

2,983,403

-

1,498,784

5,505

4,487,692

5,012,487

1981

490,683

2,805,314

-

1,633,696

3,892

4,442,902

4,933,585

1982

514,699

3,146,475

-

1,165,738

95,415

4,407,628

4,922,327

1983

421,549

2,437,805

-

971,143

4,787

3,413,735

3,835,284

1984

529,100

2,525,496

-

854,874

6,921

3,387,291

3,916,391

1985

626,438

2,106,263

-

1,025,546

6,930

3,138,739

3,765,177

1986

568,916

2,289,916

-

965,504

9,348

3,264,768

3,833,684

1987

567,887

1,831,286

-

879,312

4,789

2,715,387

3,283,274

1988

503,443

1,756,117

-

811,443

1,420

2,568,980

3,072,423

1989

486,599

1,835,253

-

738,088

2,150

2,575,491

3,062,090

1990

415,518

1,861,023

-

892,847

1,017

2,754,887

3,170,405

1991

322,621

1,825,940

-

1,253,019

2,542

3,081,501

3,404,122

1992

369,958

1,813,376

-

1,462,002

3,466

3,278,844

3,648,802

1993

400,082

1,652,042

-

2,160,093

1,890

3,814,835

4,214,917

1994

322,308

1,808,419

-

2,137,378

4,674

3,950,471

4,272,779

1995

414,662

1,870,743

-

2,043,148

1,525

3,915,416

4,330,078

1996

387,153

1,838,184

-

2,390,597

895

4,229,676

4,616,829

1997

424,167

1,911,345

-

2,623,460

298

4,535,103

4,959,270

1998

410,467

2,161,263

-

2,659,467

-

4,820,730

5,231,197

1999

376,722

1,891,094

-

2,485,356

-

4,376,450

4,753,172

2000

301,246

1,512,721

-

2,498,342

-

4,011,063

4,312,309

2001

341,096

1,195,721

-

403,200

-

1,598,921

1,940,017

2002

305,255

998,213

-

63,650

-

1,061,863

1,367,118

2003

282,085

960,806

-

49,378

-

1,010,184

1,292,269

2004

270,640

1,407,860

-

27,067

-

1,434,927

1,705,567

2005

264,292

1,371,554

-

59,137

-

1,430,691

1,694,983

2006

265,733

1,236,190

-

9,182

-

1,245,372

1,511,105