| Base- line | 95 | 96 | 97 | 98 | 99 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | Previous Year % Change | First Year % Change | |
| Southern Company | 78 | 78 | 76 | 77 | 79 | 78 | 80 | 80 | 81 | 82 | 81 | 79 | 80 | 82 | 81 | 78 | 78 | 77 | 81 | 83 | 2.5 | 6.4 |
| Duke Energy | 82 | 80 | 83 | 79 | 78 | 80 | 79 | 79 | 79 | 77 | 78 | 78 | 80 | 79 | 76 | 77 | 76 | 77 | 79 | 75 | -5.1 | -8.5 |
| American Electric Power | 78 | 80 | 82 | 77 | 78 | 77 | 79 | 76 | 75 | 74 | 75 | 74 | 75 | 73 | 76 | 74 | 73 | 72 | 79 | 75 | -5.1 | -3.8 |
| Energy Future Holdings | 73 | 74 | 77 | 70 | 76 | 74 | 76 | 71 | 75 | 74 | 74 | 72 | 65 | 63 | 68 | 72 | 73 | NM | NM | NM | N/A | N/A |
| Dominion Resources | 74 | 75 | 72 | 74 | 75 | 74 | 75 | 65 | 70 | 72 | 67 | 71 | 70 | 73 | 75 | 72 | 75 | 77 | 80 | 82 | 2.5 | 10.8 |
| GPU | 77 | 79 | 79 | 69 | 75 | 75 | 78 | # | N/A | N/A | ||||||||||||
| Edison International | 76 | 74 | 77 | 78 | 75 | 73 | 78 | 60 | 66 | 69 | 71 | 75 | 78 | 74 | 75 | 77 | 75 | 75 | 76 | 77 | 1.3 | 1.3 |
| NextEra Energy | 77 | 77 | 74 | 69 | 75 | 74 | 76 | 73 | 71 | 73 | 76 | 74 | 68 | 73 | 76 | 76 | 75 | 78 | 80 | 80 | 0.0 | 3.9 |
| All Others | 75 | 73 | 75 | 74 | 75 | 74 | 76 | 68 | 74 | 72 | 74 | 74 | 70 | 72 | 72 | 72 | 74 | 72 | 75 | 77 | 2.7 | 2.7 |
| DTE Energy | 78 | 78 | 78 | 75 | 74 | 74 | 75 | 74 | 68 | 72 | 71 | 68 | 65 | 70 | 72 | 71 | 72 | 73 | 72 | 78 | 8.3 | 0.0 |
| Public Service Enterprise Group | 79 | 80 | 77 | 75 | 74 | 73 | 78 | 75 | 76 | 76 | 73 | 74 | 75 | 73 | 75 | 76 | 78 | 78 | 77 | 74 | -3.9 | -6.3 |
| Reliant Energy | NM | NM | NM | 68 | 73 | 73 | 75 | 67 | 74 | 70 | 68 | 69 | 69 | 65 | 72 | 69 | 72 | NM | NM | NM | N/A | N/A |
| CMS Energy | 79 | 76 | 77 | 75 | 73 | 76 | 76 | 75 | 76 | 78 | 71 | 74 | 72 | 73 | 74 | 70 | 75 | 77 | 75 | 79 | 5.3 | 0.0 |
| Entergy | 75 | 76 | 75 | 70 | 70 | 69 | 74 | 69 | 74 | 71 | 73 | 75 | 70 | 73 | 74 | 74 | 73 | 76 | 78 | 81 | 3.8 | 8.0 |
| Consolidated Edison | 77 | 76 | 74 | 71 | 69 | 73 | 71 | 66 | 74 | 72 | 68 | 68 | 68 | 69 | 66 | 66 | 66 | 72 | 71 | 70 | -1.4 | -9.1 |
| Pacific Gas and Electric | 73 | 71 | 72 | 71 | 68 | 71 | 73 | 49 | 58 | 66 | 66 | 67 | 68 | 72 | 70 | 73 | 70 | 67 | 69 | 74 | 7.2 | 1.4 |
| Niagara Mohawk Power | 69 | 73 | 64 | 65 | 68 | 68 | 69 | 69 | # | N/A | N/A | |||||||||||
| Unicom | 71 | 68 | 68 | 62 | 66 | 62 | 59 | # | N/A | N/A | ||||||||||||
| PECO Energy | NM | 72 | 70 | 65 | 66 | 71 | 72 | # | N/A | N/A | ||||||||||||
| Northeast Utilities | 70 | 70 | 72 | 67 | 65 | 68 | 72 | 76 | 72 | 73 | 68 | 74 | 72 | 69 | 68 | 72 | 74 | 75 | 59 | 73 | 23.7 | 4.3 |
| Central and South West | 77 | 82 | 78 | 78 | NM | 76 | 79 | # | N/A | N/A | ||||||||||||
| Cinergy | NM | NM | NM | NM | NM | NM | NM | NM | NM | NM | 74 | 75 | 71 | # | N/A | N/A | ||||||
| KeySpan | NM | NM | NM | NM | NM | NM | NM | 68 | 72 | 71 | 74 | 70 | 71 | 74 | # | N/A | N/A | |||||
| CenterPoint Energy | NM | NM | NM | NM | NM | NM | NM | NM | NM | NM | NM | 73 | 72 | 74 | 75 | 78 | 78 | 80 | 82 | 84 | 2.4 | 15.1 |
| Atmos Energy | NM | NM | NM | NM | NM | NM | NM | NM | NM | NM | NM | NM | NM | NM | 75 | 78 | 78 | 81 | 83 | 85 | 2.4 | 13.3 |
| PPL | NM | NM | NM | NM | NM | NM | NM | 80 | 80 | 80 | 79 | 80 | 81 | 81 | 78 | 79 | 74 | 79 | 80 | 80 | 0.0 | 0.0 |
| MidAmerican Energy Holdings | NM | NM | NM | NM | NM | NM | NM | NM | NM | NM | NM | NM | NM | NM | 78 | 79 | 79 | 79 | 79 | 82 | 3.8 | 5.1 |
| Sempra Energy | NM | NM | NM | NM | NM | NM | NM | 67 | 74 | 77 | 77 | 79 | 75 | 80 | 80 | 80 | 83 | 81 | 83 | 80 | -3.6 | 19.4 |
| PacifiCorp | NM | NM | NM | NM | NM | NM | NM | 72 | 71 | 76 | NM | NM | NM | NM | NM | NM | NM | NM | NM | NM | N/A | N/A |
| Xcel Energy | NM | NM | NM | NM | NM | NM | NM | 65 | 74 | 73 | 70 | 68 | 70 | 71 | 73 | 76 | 72 | 74 | 74 | 76 | 2.7 | 16.9 |
| NiSource | NM | NM | NM | NM | NM | NM | NM | 67 | 68 | 66 | 68 | 68 | 66 | 72 | 70 | 71 | 76 | 76 | 81 | 81 | 0.0 | 20.9 |
| Ameren | NM | NM | NM | NM | NM | NM | NM | 78 | 76 | 77 | 74 | 75 | 74 | 57 | 64 | 68 | 71 | 71 | 78 | 74 | -5.1 | -5.1 |
| Iberdrola | NM | NM | NM | NM | NM | NM | NM | 73 | 73 | 71 | 70 | 73 | 74 | 70 | 75 | 73 | 72 | NM | NM | NM | N/A | N/A |
| FirstEnergy | NM | NM | NM | NM | NM | NM | NM | 72 | 77 | 76 | 69 | 71 | 75 | 76 | 77 | 74 | 75 | 78 | 76 | 75 | -1.3 | 4.2 |
| Pepco Holdings | NM | NM | NM | NM | NM | NM | NM | NM | NM | 77 | 72 | 73 | 71 | 70 | 69 | 68 | 70 | 54 | 69 | 71 | 2.9 | -7.8 |
| Allegheny Energy | NM | NM | NM | NM | NM | NM | NM | 79 | 80 | 76 | 75 | 74 | 80 | 79 | NM | NM | NM | NM | NM | NM | N/A | N/A |
| Progress Energy | NM | NM | NM | NM | NM | NM | NM | 76 | 77 | 75 | 78 | 75 | 77 | 77 | 77 | 75 | 73 | 78 | 76 | # | N/A | N/A |
| Exelon | 66 | 69 | 71 | 71 | 71 | 70 | 68 | 69 | 70 | 72 | 73 | 70 | 74 | 5.7 | 12.1 | |||||||
| National Grid | 73 | 75 | 69 | 72 | 65 | 71 | 71 | 71 | 70 | NM | NM | NM | N/A | N/A | ||||||||
| Investor-Owned Utilities | 74 | 76 | 77 | 1.3 | 4.1 |
Score tables print best in landscape.
Legend

Notes
The ACSI releases industry results monthly and updates the national index quarterly. Baseline measurements are from the summer of 1994.
The "All Others" score for an industry represents the remainder of the total industry market share, less the market shares of the measured companies. This benchmark is an aggregate of a representative number of customer interviews from each of potentially hundreds of smaller companies within the industry.
**The limited-service restaurant industry was not measured in 2004 due to a change in the quarterly measurement system that was in place at that time.