Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
| Time Class | Variable | |
|---|---|---|
|
| ||
| Pre-Coding | Post-Coding | |
| Month 1 | −6 | 0 |
| Month 2 | −5 | 0 |
| Month 3 | −4 | 0 |
| Month 4 | −3 | 0 |
| Month 5 | −2 | 0 |
| Month 6 | −1 | 0 |
| Month 7 (start of coding) | 0 | 0 |
| Month 8 | 0 | 1 |
| Month 9 | 0 | 2 |
| Month 10 | 0 | 3 |
| Month 11 | 0 | 4 |
| Month 12 | 0 | 5 |
