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Table 1 Total number of hectares disturbed per year, by disturbance type, for the US.

From: The LANDFIRE Refresh Strategy: Updating the National Dataset

    Area disturbed per year by each disturbance type (ha)  
Year Biological Chemical or herbicide Development Fire Insects or disease Silviculture Unknown Weather Total
1999 0 24 380 690 2 565 741 218 770 236 533 1 212 286 59 213 4 317 613
2000 6 51 467 329 3 080 467 127 444 216 624 1 001 114 1 901 4 479 352
2001 5 89 150 1087 1 555 095 318 272 219 127 1 138 873 2 489 3 324 098
2002 68 108 629 145 3 001 186 185 693 225 215 959 352 62 733 4 543 021
2003 7 87 550 103 2 151 991 155 645 261 293 1 068 440 4 940 3 729 969
2004 0 95 108 218 3 701 915 364 508 302 183 1 113 701 914 5 578 547
2005 0 105 600 350 4 286 368 445 740 249 015 1 150 379 9 606 6 247 058
2006 69 52 099 130 4 390 539 388 165 256 065 990 026 4 082 6 081 175
2007 0 192 480 272 4 216 351 535 471 283 144 977 274 8 308 6 213 300
2008 105 124 968 74 2 358 701 605 314 153 493 1 344 627 24 720 4 612 002
Total 260 931 431 3 398 31 308 354 3 345 022 2 402 692 10 956 072 178 906 49 126 135