| 2009 | 2009 | 2009 | 2009 | 2010 | 2010 | 2010 | 2010 | 2011 | 2011 | |
|---|---|---|---|---|---|---|---|---|---|---|
| Q1 | Q2 | Q3 | Q4 | Q1 | Q2 | Q3 | Q4 | Q1 | Q2 | |
| Total operating revenue | 1.5% | 1.6% | 1.3% | 1.3% | 1.5% | 1.5% | 1.8% | 1.6% | 1.3% | 1.2% |
| CV from 0.01% to 4.99% is excellent CV from 5.00% to 9.99% is very good CV from 10.00% to 14.99% is good CV from 15.00% to 24.99% is acceptable CV from 25.00% to 34.99% should be used with caution CV is 35.00% or higher is unreliable |
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| 2009 | 2009 | 2009 | 2009 | 2010 | 2010 | 2010 | 2010 | 2011 | 2011 | |
|---|---|---|---|---|---|---|---|---|---|---|
| Q1 | Q2 | Q3 | Q4 | Q1 | Q2 | Q3 | Q4 | Q1 | Q2 | |
| Weighted response rate | 74% | 81% | 79% | 74% | 79% | 78% | 78% | 82% | 85% | 85% |