Table 5. Number of private sector establishments by age Mining, Quarrying, and Oil and Gas Extraction Age Class March 1991 March 1992 March 1993 March 1994 March 1995 March 1996 Less than one year _ _ _ 1,862 2,060 1,814 1 year _ _ _ _ 1,444 1,588 2 years _ _ _ _ _ 1,181 3 years _ _ _ _ _ _ 4 years _ _ _ _ _ _ 5 years _ _ _ _ _ _ 6 years _ _ _ _ _ _ 7 years _ _ _ _ _ _ 8 years _ _ _ _ _ _ 9 years _ _ _ _ _ _ 10 years _ _ _ _ _ _ 11 years _ _ _ _ _ _ 12 years _ _ _ _ _ _ 13 years _ _ _ _ _ _ 14 years _ _ _ _ _ _ 15 years _ _ _ _ _ _ 16 years _ _ _ _ _ _ 17 years _ _ _ _ _ _ 18 years _ _ _ _ _ _ 19 years _ _ _ _ _ _ 20 years _ _ _ _ _ _ 21 years _ _ _ _ _ _ 22 years _ _ _ _ _ _ 23 years _ _ _ _ _ _ 24 years _ _ _ _ _ _ 25 years _ _ _ _ _ _ 26 years _ _ _ _ _ _ 27 years _ _ _ _ _ _ 28 years _ _ _ _ _ _ 29 years _ _ _ _ _ _ Born before March 1993 26,311 25,622 25,027 22,431 20,389 18,782 Total 26,311 25,622 25,027 24,293 23,893 23,365 Age Class March 1997 March 1998 March 1999 March 2000 March 2001 March 2002 Less than one year 2,161 1,999 1,610 1,742 1,957 2,012 1 year 1,430 1,694 1,468 1,289 1,404 1,529 2 years 1,387 1,237 1,411 1,202 1,184 1,212 3 years 1,082 1,242 1,004 1,222 1,077 1,041 4 years _ 974 1,069 903 1,097 950 5 years _ _ 843 963 824 979 6 years _ _ _ 784 867 728 7 years _ _ _ _ 730 802 8 years _ _ _ _ _ 669 9 years _ _ _ _ _ _ 10 years _ _ _ _ _ _ 11 years _ _ _ _ _ _ 12 years _ _ _ _ _ _ 13 years _ _ _ _ _ _ 14 years _ _ _ _ _ _ 15 years _ _ _ _ _ _ 16 years _ _ _ _ _ _ 17 years _ _ _ _ _ _ 18 years _ _ _ _ _ _ 19 years _ _ _ _ _ _ 20 years _ _ _ _ _ _ 21 years _ _ _ _ _ _ 22 years _ _ _ _ _ _ 23 years _ _ _ _ _ _ 24 years _ _ _ _ _ _ 25 years _ _ _ _ _ _ 26 years _ _ _ _ _ _ 27 years _ _ _ _ _ _ 28 years _ _ _ _ _ _ 29 years _ _ _ _ _ _ Born before March 1993 17,524 16,473 15,037 14,031 13,251 12,489 Total 23,584 23,619 22,442 22,136 22,391 22,411 Age Class March 2003 March 2004 March 2005 March 2006 March 2007 March 2008 Less than one year 1,654 1,800 2,043 2,494 2,876 2,756 1 year 1,556 1,355 1,512 1,757 2,041 2,369 2 years 1,295 1,335 1,192 1,365 1,540 1,776 3 years 1,044 1,188 1,219 1,084 1,265 1,399 4 years 832 951 1,130 1,121 990 1,174 5 years 853 790 884 1,049 1,041 909 6 years 908 793 729 820 992 976 7 years 679 851 745 703 790 947 8 years 724 626 804 703 660 753 9 years 645 700 573 741 650 647 10 years _ 607 664 544 706 621 11 years _ _ 571 636 521 674 12 years _ _ _ 552 601 497 13 years _ _ _ _ 528 581 14 years _ _ _ _ _ 503 15 years _ _ _ _ _ _ 16 years _ _ _ _ _ _ 17 years _ _ _ _ _ _ 18 years _ _ _ _ _ _ 19 years _ _ _ _ _ _ 20 years _ _ _ _ _ _ 21 years _ _ _ _ _ _ 22 years _ _ _ _ _ _ 23 years _ _ _ _ _ _ 24 years _ _ _ _ _ _ 25 years _ _ _ _ _ _ 26 years _ _ _ _ _ _ 27 years _ _ _ _ _ _ 28 years _ _ _ _ _ _ 29 years _ _ _ _ _ _ Born before March 1993 11,731 11,367 11,020 10,708 10,353 10,065 Total 21,921 22,363 23,086 24,277 25,554 26,647 Age Class March 2009 March 2010 March 2011 March 2012 March 2013 March 2014 Less than one year 2,620 2,046 2,535 3,086 2,941 2,867 1 year 2,152 2,014 1,639 2,115 2,482 2,334 2 years 1,992 1,781 1,786 1,416 1,764 2,156 3 years 1,568 1,704 1,590 1,614 1,251 1,583 4 years 1,252 1,342 1,551 1,480 1,463 1,151 5 years 1,068 1,138 1,276 1,429 1,353 1,341 6 years 840 982 1,038 1,177 1,300 1,263 7 years 902 774 902 995 1,071 1,202 8 years 897 860 745 834 909 1,011 9 years 722 832 785 715 777 855 10 years 606 675 776 767 673 730 11 years 589 577 660 756 715 636 12 years 636 564 573 639 720 670 13 years 481 598 557 545 589 687 14 years 543 461 569 546 529 565 15 years 489 517 452 562 527 509 16 years _ 483 502 449 553 496 17 years _ _ 457 476 427 536 18 years _ _ _ 441 464 416 19 years _ _ _ _ 417 443 20 years _ _ _ _ _ 398 21 years _ _ _ _ _ _ 22 years _ _ _ _ _ _ 23 years _ _ _ _ _ _ 24 years _ _ _ _ _ _ 25 years _ _ _ _ _ _ 26 years _ _ _ _ _ _ 27 years _ _ _ _ _ _ 28 years _ _ _ _ _ _ 29 years _ _ _ _ _ _ Born before March 1993 9,753 9,455 9,211 9,073 8,853 8,593 Total 27,110 26,803 27,604 29,115 29,778 30,442 Age Class March 2015 March 2016 March 2017 March 2018 March 2019 March 2020 Less than one year 2,865 1,849 1,939 2,354 2,476 1,917 1 year 2,215 1,982 1,343 1,582 1,913 1,882 2 years 1,938 1,666 1,587 1,200 1,390 1,540 3 years 1,885 1,488 1,343 1,427 1,066 1,204 4 years 1,401 1,516 1,302 1,236 1,321 937 5 years 1,005 1,122 1,305 1,182 1,096 1,152 6 years 1,189 879 972 1,182 1,077 974 7 years 1,133 985 746 894 1,089 973 8 years 1,099 993 858 675 824 956 9 years 926 951 860 800 635 741 10 years 792 806 827 786 738 581 11 years 705 686 693 757 724 661 12 years 606 642 623 638 709 687 13 years 644 542 600 572 590 655 14 years 650 575 501 560 534 531 15 years 521 576 534 478 521 499 16 years 508 485 524 506 462 505 17 years 468 467 445 508 471 448 18 years 509 431 444 411 478 446 19 years 393 490 401 425 392 455 20 years 429 360 458 384 395 356 21 years 382 407 329 447 351 372 22 years _ 356 375 316 425 338 23 years _ _ 326 358 311 389 24 years _ _ _ 307 336 297 25 years _ _ _ _ 297 312 26 years _ _ _ _ _ 278 27 years _ _ _ _ _ _ 28 years _ _ _ _ _ _ 29 years _ _ _ _ _ _ Born before March 1993 8,375 7,971 7,496 7,232 6,964 6,708 Total 30,638 28,225 26,831 27,217 27,585 26,794 Age Class March 2021 March 2022 March 2023 Less than one year 1,615 2,127 2,135 1 year 1,445 1,261 1,609 2 years 1,558 1,265 1,076 3 years 1,250 1,375 1,143 4 years 1,034 1,158 1,225 5 years 771 930 1,049 6 years 975 689 847 7 years 853 909 636 8 years 828 791 829 9 years 856 773 735 10 years 641 790 720 11 years 488 591 726 12 years 574 447 556 13 years 605 551 423 14 years 582 565 522 15 years 495 558 530 16 years 453 457 525 17 years 448 432 432 18 years 399 427 422 19 years 413 364 404 20 years 424 388 347 21 years 343 393 387 22 years 351 321 368 23 years 305 333 296 24 years 368 282 312 25 years 270 353 272 26 years 291 255 334 27 years 259 280 235 28 years _ 245 274 29 years _ _ 242 Born before March 1993 6,308 6,049 5,870 Total 25,202 25,359 25,481 NOTE: A '_' indicates that the data are not available and a 'N' indicates that the data do not meet BLS disclosure standards.