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Grade of Adolescents Included in Each Cohort in Each Year of the CHS, 1994–2014
| Cohort | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2012 | 2014 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 11a | 12a | — | — | — | — | — | — | — | — | — | — | — |
| B | 8 | 9 | 10 | 11a | 12a | — | — | — | — | — | — | — | — |
| C | 5 | 6 | 7 | 8 | 9 | 10 | 11a | 12a | — | — | — | — | — |
| D | — | — | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11a | 12a | — | — |
| E1 | — | — | — | — | — | — | — | — | — | K | 1 | 9 | 11a |
| E2 | — | — | — | — | — | — | — | — | — | 1 | 2 | 10 | 12a |
—, no data collected.
Data included in analysis
