| | Performance scale scores |
| Total, 2002 | 258 | (0.7) | 268 | (0.7) | 266 | (0.6) |
| Total, 2003 | 258 | (0.5) | 267 | (0.5) | 264 | (0.4) |
| Total, 2005 | 257 | (0.4) | 266 | (0.3) | 263 | (0.4) |
| Parental education level |
| Did not finish high school |
| 2002 | 244 | (1.4) | 249 | (1.7) | 250 | (1.5) |
| 2003 | 242 | (1.3) | 246 | (1.0) | 247 | (0.9) |
| 2005 | 241 | (0.8) | 245 | (0.9) | 248 | (0.9) |
| Graduated high school |
| 2002 | 250 | (1.0) | 259 | (0.9) | 259 | (0.7) |
| 2003 | 247 | (0.8) | 257 | (0.8) | 257 | (0.5) |
| 2005 | 247 | (0.6) | 255 | (0.6) | 255 | (0.6) |
| Some education after high school |
| 2002 | 262 | (0.8) | 270 | (0.8) | 270 | (0.6) |
| 2003 | 261 | (0.7) | 269 | (0.6) | 269 | (0.5) |
| 2005 | 261 | (0.5) | 268 | (0.4) | 267 | (0.6) |
| Graduated college |
| 2002 | 270 | (0.7) | 277 | (0.8) | 274 | (0.6) |
| 2003 | 269 | (0.7) | 276 | (0.5) | 273 | (0.5) |
| 2005 | 268 | (0.5) | 275 | (0.3) | 271 | (0.5) |
| Unknown |
| 2002 | 242 | (1.4) | 249 | (1.1) | 252 | (1.8) |
| 2003 | 240 | (0.9) | 243 | (1.1) | 246 | (1.1) |
| 2005 | 238 | (0.6) | 245 | (0.7) | 246 | (0.9) |
| | Percentage distribution |
| Total, 2002 | 29 | (0.6) | 42 | (0.7) | 29 | (0.5) |
| Total, 2003 | 29 | (0.4) | 41 | (0.4) | 29 | (0.4) |
| Total, 2005 | 31 | (0.4) | 43 | (0.4) | 25 | (0.3) |
| Parental education level |
| Did not finish high school |
| 2002 | 34 | (1.6) | 35 | (1.7) | 30 | (1.4) |
| 2003 | 36 | (1.0) | 34 | (1.1) | 30 | (1.0) |
| 2005 | 39 | (0.7) | 36 | (0.7) | 25 | (0.6) |
| Graduated high school |
| 2002 | 28 | (0.9) | 35 | (0.9) | 36 | (0.9) |
| 2003 | 28 | (0.6) | 36 | (0.6) | 37 | (0.7) |
| 2005 | 30 | (0.5) | 39 | (0.6) | 31 | (0.5) |
| Some education after high school |
| 2002 | 28 | (0.9) | 40 | (1.0) | 32 | (0.8) |
| 2003 | 28 | (0.5) | 41 | (0.6) | 31 | (0.6) |
| 2005 | 30 | (0.5) | 42 | (0.5) | 28 | (0.5) |
| Graduated college |
| 2002 | 27 | (0.7) | 46 | (0.8) | 27 | (0.5) |
| 2003 | 28 | (0.5) | 46 | (0.5) | 27 | (0.5) |
| 2005 | 29 | (0.5) | 47 | (0.5) | 23 | (0.4) |
| Unknown |
| 2002 | 36 | (1.2) | 39 | (1.2) | 25 | (0.9) |
| 2003 | 37 | (0.9) | 39 | (1.0) | 24 | (0.7) |
| 2005 | 40 | (0.7) | 39 | (0.6) | 21 | (0.5) |
| NOTE: The NAEP Reading scale ranges from 0 to 500. Observed differences are not necessarily statistically significant. Detail may not sum to totals because of rounding. Standard errors appear in parentheses. |
| SOURCE: U.S. Department of Education, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2002, 2003, and 2005 Reading Assessment, NAEP Data Explorer. |
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