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| Overlapping geographic areas (numbers indicate data points in each area): |
| 4,811 | Alabama |
| 12,406 | Alaska |
| 12,951 | Arizona |
| 3,744 | Arkansas |
| 42,749 | California |
| 17,661 | Colorado |
| 1,268 | Connecticut |
| 48 | Delaware |
| 50 | District of Columbia |
| 1,598 | Florida |
| 2,657 | Georgia |
| 50 | Hawaii |
| 10,315 | Idaho |
| 2,293 | Illinois |
| 1,043 | Indiana |
| 3,418 | Iowa |
| 180 | Kansas |
| 625 | Kentucky |
| 594 | Louisiana |
| 1,662 | Maine |
| 1,087 | Maryland |
| 1,127 | Massachusetts |
| 3,115 | Michigan |
| 2,339 | Minnesota |
| 1,171 | Mississippi |
| 12,899 | Missouri |
|
| 10,292 | Montana |
| 86 | Nebraska |
| 15,444 | Nevada |
| 749 | New Hampshire |
| 1,261 | New Jersey |
| 8,101 | New Mexico |
| 3,185 | New York |
| 5,183 | North Carolina |
| 323 | North Dakota |
| 1,444 | Ohio |
| 4,468 | Oklahoma |
| 16,395 | Oregon |
| 2,803 | Pennsylvania |
| 126 | Rhode Island |
| 1,785 | South Carolina |
| 2,478 | South Dakota |
| 4,668 | Tennessee |
| 2,679 | Texas |
| 13,703 | Utah |
| 976 | Vermont |
| 4,476 | Virginia |
| 11,082 | Washington |
| 320 | West Virginia |
| 6,154 | Wisconsin |
| 4,967 | Wyoming |
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