| Mean (SD) |
---|---|
Within last month | |
 Within 1/10 mile | 1.9 (0.1) |
 Within 1/4 mile | 8.8 (0.2) |
 Within 1/2 mile | 31.0 (0.7) |
 Within 3/4 mile | 64.2 (1.2) |
Within last 3Â months | |
 Within 1/10 mile | 5.6 (0.2) |
 Within 1/4 mile | 25.2 (0.6) |
 Within 1/2 mile | 88.6 (2.0) |
 Within 3/4 mile | 183.3 (3.1) |
Within last 6Â months | |
 Within 1/10 mile | 10.8 (0.4) |
 Within 1/4 mile | 47.8 (1.2) |
 Within 1/2 mile | 167.2 (3.6) |
 Within 3/4 mile | 346.9 (5.7) |
Within last year | |
 Within 1/10 mile | 21.4 (0.7) |
 Within 1/4 mile | 93.6 (2.2) |
 Within 1/2 mile | 333.5 (7.1) |
 Within 3/4 mile | 695.5 (14.3) |
Within 2Â years | |
 Within 1/10 mile | 44.4 (1.4) |
 Within 1/4 mile | 191.9 (4.5) |
 Within 1/2 mile | 685.2 (14.3) |
 Within 3/4 mile | 1424.1 (21.9) |