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 |