Quarterly Sales Estimates for ROK
| 03-2007 | 1211 | 1191.2 | 1197.591 | 0 | 4/13/2007 |
| 06-2007 | 1284 | 1249 | 1273.22 | 14.175 | 7/10/2007 |
| 09-2007 | 1371.6 | 1352.5 | 1363.033 | 9.7 | 10/12/2007 |
| 12-2007 | 1333 | 1285 | 1305.896 | 21.736 | 1/14/2008 |
| 03-2008 | 1378.3 | 1355 | 1369.621 | 9.368 | 4/1/2008 |
| 06-2008 | 1450 | 1439.4 | 1444.7 | 7.495 | 6/26/2008 |
| 09-2008 | 1576.3 | 1240 | 1467.038 | 131.019 | 10/15/2008 |
| 12-2008 | 1300 | 1220.7 | 1265.811 | 26.689 | 1/9/2009 |
| 03-2009 | 1278 | 928.6 | 1093.923 | 111.75 | 4/23/2009 |
| 06-2009 | 1071.8 | 1008.8 | 1031.693 | 24.96 | 7/14/2009 |
| 09-2009 | 1090 | 1020.7 | 1059.822 | 23.282 | 10/13/2009 |
| 12-2009 | 1069 | 1015.1 | 1048.358 | 18.461 | 1/19/2010 |
| 03-2010 | 1124.7 | 1080.827 | 1106.737 | 17.67 | 4/13/2010 |
| 06-2010 | 1261.5 | 1174.07 | 1227.166 | 30.366 | 7/13/2010 |
| 09-2010 | 1343.2 | 1285 | 1320.331 | 19.14 | 10/20/2010 |
| 12-2010 | 1341.9 | 1220.8 | 1294.732 | 41.242 | 1/21/2011 |
| 03-2011 | 1449.3 | 1367.6 | 1417.243 | 28.225 | 4/19/2011 |