In the downloadable PDF below, senators are assigned separate scores for their roll-call votes on key economic, social, and foreign policy issues during 2013. The senators are rated in each of three issue categories on both liberal and conservative scales, with the scores on each scale given as percentiles. An economic score of 15 on the liberal scale, for example, means that the senator was more liberal than 85 percent of his or her Senate colleagues on the key votes in that issue area during 2013. An asterisk [*] means that the senator missed more than half of the rated votes in an issue area. Composite scores are calculated based on the issued-based scores. Members with the same composite scores are tied in rank.